{"id":16128,"date":"2024-01-21T04:04:15","date_gmt":"2024-01-21T00:34:15","guid":{"rendered":"https:\/\/rasanegar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/"},"modified":"2024-01-21T04:04:15","modified_gmt":"2024-01-21T00:34:15","slug":"%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4","status":"publish","type":"post","link":"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/","title":{"rendered":"\u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 Node.js \u0628\u0627 EventEmitter \u062f\u0631 \u0627\u06cc\u0646 \u0622\u0645\u0648\u0632\u0634\u060c \u0645\u0627 \u0642\u0635\u062f \u062f\u0627\u0631\u06cc\u0645 \u0646\u06af\u0627\u0647\u06cc \u0628\u0647 \u06a9\u0644\u0627\u0633 EventEmitter \u0628\u0648\u0645\u06cc Node \u0628\u06cc\u0646\u062f\u0627\u0632\u06cc\u0645.  \u0634\u0645\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u060c \u06a9\u0627\u0631\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 EvenEmitter \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u062f \u0648 \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u06cc\u0627\u062f \u062e\u0648\u0627\u0647\u06cc\u062f \u06af\u0631\u0641\u062a.  \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc \u0628\u0648\u0645\u06cc \u062f\u06cc\u06af\u0631 \u0631\u0627 \u0627\u0632 \u06a9\u0644\u0627\u0633 EventEmitter \u0648 \u0686\u0646\u062f \u0646\u0645\u0648\u0646\u0647 \u062a\u0627&#8230;"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0633\u0631\u0641\u0635\u0644\u0647\u0627\u06cc \u0645\u0637\u0644\u0628<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d9%85%d8%b9%d8%b1%d9%81%db%8c\" >\u0645\u0639\u0631\u0641\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%db%8c%da%a9_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af_%da%86%db%8c%d8%b3%d8%aa%d8%9f\" >\u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0686\u06cc\u0633\u062a\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#event_emitter_%da%86%db%8c%d8%b3%d8%aa%d8%9f\" >Event Emitter \u0686\u06cc\u0633\u062a\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%a7%db%8c%d8%ac%d8%a7%d8%af_eventemitters\" >\u0627\u06cc\u062c\u0627\u062f EventEmitters<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%a7%db%8c%d8%ac%d8%a7%d8%af_%db%8c%da%a9_event_emitter_%d9%87%d8%af%d9%81_%e2%80%93_%d8%b4%db%8c\" >\u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 Event Emitter \u0647\u062f\u0641 &#8211; \u0634\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#event_emitter_%d8%a8%d8%a7_%da%86%d9%86%d8%af%db%8c%d9%86_%d8%b4%d9%86%d9%88%d9%86%d8%af%d9%87\" >Event Emitter \u0628\u0627 \u0686\u0646\u062f\u06cc\u0646 \u0634\u0646\u0648\u0646\u062f\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%af%d8%b1_%d8%ad%d8%a7%d9%84_%d8%aa%d9%85%d8%af%db%8c%d8%af_event_emitter\" >\u062f\u0631 \u062d\u0627\u0644 \u062a\u0645\u062f\u06cc\u062f Event Emitter<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%aa%d9%88%d8%a7%d8%a8%d8%b9_%d9%85%d9%87%d9%85_%d8%a7%d8%b2_event_emitter\" >\u062a\u0648\u0627\u0628\u0639 \u0645\u0647\u0645 \u0627\u0632 Event Emitter<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%afnames\" >\u0631\u0648\u06cc\u062f\u0627\u062fNames()<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#removelistener\" >removeListener()<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#removealllisteners\" >removeAllListeners()<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%b1%d8%b3%db%8c%d8%af%da%af%db%8c_%d8%a8%d9%87_%d8%ae%d8%b7%d8%a7\" >\u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u062e\u0637\u0627<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87_%d8%a7%d8%b2_%d9%85%d8%a7%da%98%d9%88%d9%84_%d9%87%d8%a7%db%8c_%d8%a8%d9%88%d9%85%db%8c_event_emitter\" >\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc \u0628\u0648\u0645\u06cc Event Emitter<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/rasanegaar.com\/blog\/%d9%85%d8%af%db%8c%d8%b1%db%8c%d8%aa-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-js-%d8%a8%d8%a7-eventemitter-%d8%af%d8%b1-%d8%a7%db%8c%d9%86-%d8%a2%d9%85%d9%88%d8%b2%d8%b4\/#%d9%86%d8%aa%db%8c%d8%ac%d9%87\" >\u0646\u062a\u06cc\u062c\u0647<\/a><\/li><\/ul><\/nav><\/div>\n<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">\u0632\u0645\u0627\u0646 \u0644\u0627\u0632\u0645 \u0628\u0631\u0627\u06cc \u0645\u0637\u0627\u0644\u0639\u0647: <\/span> <span class=\"rt-time\"> 9<\/span> <span class=\"rt-label rt-postfix\">\u062f\u0642\u06cc\u0642\u0647<\/span><\/span><p> <br \/>\n<\/p>\n<div class=\"content\"><noscript><\/p>\n<style>.lazyload-placeholder { display: none;  }<\/style>\n<p><\/noscript><\/p>\n<h2 id=\"introduction\"><span class=\"ez-toc-section\" id=\"%d9%85%d8%b9%d8%b1%d9%81%db%8c\"><\/span>\u0645\u0639\u0631\u0641\u06cc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0622\u0645\u0648\u0632\u0634 \u0642\u0635\u062f \u062f\u0627\u0631\u06cc\u0645 \u0646\u06af\u0627\u0647\u06cc \u0628\u0647 \u0628\u0648\u0645\u06cc Node \u0628\u06cc\u0627\u0646\u062f\u0627\u0632\u06cc\u0645 <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633  \u0634\u0645\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u060c \u0622\u0646\u0686\u0647 \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 \u0622\u0646 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u062f\u060c \u06cc\u0627\u062f \u062e\u0648\u0627\u0647\u06cc\u062f \u06af\u0631\u0641\u062a <code>EvenEmitter<\/code>\u0648 \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f.<\/p>\n<p>\u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u0627\u0698\u0648\u0644\u200c\u0647\u0627\u06cc \u0628\u0648\u0645\u06cc \u062f\u06cc\u06af\u0631 \u0631\u0627 \u067e\u0648\u0634\u0634 \u062e\u0648\u0627\u0647\u06cc\u0645 \u062f\u0627\u062f <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633 \u0648 \u0686\u0646\u062f \u0645\u062b\u0627\u0644 \u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0622\u0646\u0686\u0647 \u062f\u0631 \u067e\u0634\u062a \u0635\u062d\u0646\u0647 \u0645\u06cc \u06af\u0630\u0631\u062f.<\/p>\n<p>\u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 \u0628\u0647 \u0637\u0648\u0631 \u062e\u0644\u0627\u0635\u0647\u060c \u0645\u0627 \u062a\u0642\u0631\u06cc\u0628\u0627\u064b \u0647\u0631 \u0622\u0646\u0686\u0647 \u0631\u0627 \u06a9\u0647 \u0628\u0627\u06cc\u062f \u062f\u0631 \u0645\u0648\u0631\u062f \u0622\u0646 \u0628\u062f\u0627\u0646\u06cc\u062f \u0631\u0627 \u067e\u0648\u0634\u0634 \u062e\u0648\u0627\u0647\u06cc\u0645 \u062f\u0627\u062f <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633<\/p>\n<p>\u0645\u0627 \u062f\u0631 \u0627\u06cc\u0646 \u0622\u0645\u0648\u0632\u0634 \u0627\u0632 \u0628\u0631\u062e\u06cc \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u0627\u0633\u0627\u0633\u06cc ES6 \u0645\u0627\u0646\u0646\u062f \u06a9\u0644\u0627\u0633 \u0647\u0627\u06cc \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0648 \u062a\u0648\u0627\u0628\u0639 \u067e\u06cc\u06a9\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062e\u0648\u0627\u0647\u06cc\u0645 \u06a9\u0631\u062f.  \u0627\u06af\u0631 \u062f\u0627\u0646\u0634 \u0642\u0628\u0644\u06cc \u0627\u0632 \u0646\u062d\u0648 ES6 \u062f\u0627\u0631\u06cc\u062f\u060c \u0645\u0641\u06cc\u062f \u0627\u0633\u062a\u060c \u0627\u0645\u0627 \u0627\u062c\u0628\u0627\u0631\u06cc \u0646\u06cc\u0633\u062a.<\/p>\n<h2 id=\"whatisanevent\"><span class=\"ez-toc-section\" id=\"%db%8c%da%a9_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af_%da%86%db%8c%d8%b3%d8%aa%d8%9f\"><\/span>\u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0686\u06cc\u0633\u062a\u061f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u06cc\u06a9 \u0627\u0644\u06af\u0648\u06cc \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631\u06cc \u06a9\u0627\u0645\u0644 \u062d\u0648\u0644 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0646\u0647\u0627 \u0645\u06cc \u0686\u0631\u062e\u062f.  \u0645\u0639\u0645\u0627\u0631\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631 \u0627\u0645\u0631\u0648\u0632\u0647 \u0646\u0633\u0628\u062a\u0627\u064b \u0631\u0627\u06cc\u062c \u0627\u0633\u062a \u0648 \u0628\u0631\u0646\u0627\u0645\u0647 \u0647\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631 \u0627\u0646\u0648\u0627\u0639 \u0645\u062e\u062a\u0644\u0641\u06cc \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0631\u0627 \u062a\u0648\u0644\u06cc\u062f\u060c \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u0648 \u0648\u0627\u06a9\u0646\u0634 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f.<\/p>\n<p>\u0645\u06cc \u062a\u0648\u0627\u0646 \u06af\u0641\u062a \u06a9\u0647 \u0647\u0633\u062a\u0647 Node.js \u062a\u0627 \u062d\u062f\u06cc \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u0633\u062a \u0632\u06cc\u0631\u0627 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc \u0628\u0648\u0645\u06cc \u0645\u0627\u0646\u0646\u062f \u0633\u06cc\u0633\u062a\u0645 \u0641\u0627\u06cc\u0644 (<code>fs<\/code>) \u0648 <code>stream<\/code> \u0645\u0627\u0698\u0648\u0644 \u0628\u0647 \u0635\u0648\u0631\u062a \u0646\u0648\u0634\u062a\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a <code>EventEmitter<\/code>\u062e\u0648\u062f\u0634\u0648\u0646<\/p>\n<p>\u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631\u060c \u06cc\u06a9 <em>\u0631\u0648\u06cc\u062f\u0627\u062f<\/em> \u0646\u062a\u06cc\u062c\u0647 \u06cc\u06a9 \u06cc\u0627 \u0686\u0646\u062f \u0639\u0645\u0644 \u0627\u0633\u062a.  \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644\u060c \u0627\u06cc\u0646 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u06cc\u06a9 \u0627\u0642\u062f\u0627\u0645 \u06a9\u0627\u0631\u0628\u0631 \u06cc\u0627 \u06cc\u06a9 \u062e\u0631\u0648\u062c\u06cc \u062f\u0648\u0631\u0647 \u0627\u06cc \u0627\u0632 \u06cc\u06a9 \u062d\u0633\u06af\u0631 \u0628\u0627\u0634\u062f.<\/p>\n<p>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0631\u0646\u0627\u0645\u0647\u200c\u0647\u0627\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631 \u0631\u0627 \u0628\u0647\u200c\u0639\u0646\u0648\u0627\u0646 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0627\u0646\u062a\u0634\u0627\u0631-\u0627\u0634\u062a\u0631\u0627\u06a9 \u0645\u0634\u0627\u0647\u062f\u0647 \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u06cc\u06a9 \u0646\u0627\u0634\u0631 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0631\u0627 \u0631\u0627\u0647\u200c\u0627\u0646\u062f\u0627\u0632\u06cc \u0645\u06cc\u200c\u06a9\u0646\u062f \u0648 \u0645\u0634\u062a\u0631\u06a9\u0627\u0646 \u0628\u0647 \u0622\u0646\u0647\u0627 \u06af\u0648\u0634 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f \u0648 \u0645\u0637\u0627\u0628\u0642 \u0628\u0627 \u0622\u0646 \u0639\u0645\u0644 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f.<\/p>\n<p>\u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644\u060c \u0641\u0631\u0636 \u06a9\u0646\u06cc\u062f \u06cc\u06a9 \u0633\u0631\u0648\u0631 \u062a\u0635\u0648\u06cc\u0631 \u062f\u0627\u0631\u06cc\u0645 \u06a9\u0647 \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u062a\u0635\u0627\u0648\u06cc\u0631 \u0631\u0627 \u062f\u0631 \u0622\u0646 \u0622\u067e\u0644\u0648\u062f \u06a9\u0646\u0646\u062f.  \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631\u060c \u0627\u0642\u062f\u0627\u0645\u06cc \u0645\u0627\u0646\u0646\u062f \u0622\u067e\u0644\u0648\u062f \u062a\u0635\u0648\u06cc\u0631 \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u062f.  \u0628\u0631\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0646 \u0646\u06cc\u0632 \u0648\u062c\u0648\u062f \u062e\u0648\u0627\u0647\u062f \u062f\u0627\u0634\u062a <code>1..n<\/code> \u0645\u0634\u062a\u0631\u06a9\u06cc\u0646 \u0622\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f<\/p>\n<p>\u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0622\u067e\u0644\u0648\u062f \u0641\u0639\u0627\u0644 \u0634\u062f\u060c \u06cc\u06a9 \u0645\u0634\u062a\u0631\u06a9 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0627 \u0627\u0631\u0633\u0627\u0644 \u06cc\u06a9 \u0627\u06cc\u0645\u06cc\u0644 \u0628\u0647 \u0645\u062f\u06cc\u0631 \u0648\u0628 \u0633\u0627\u06cc\u062a \u0628\u0647 \u0622\u0646 \u0648\u0627\u06a9\u0646\u0634 \u0646\u0634\u0627\u0646 \u062f\u0647\u062f \u0648 \u0628\u0647 \u0622\u0646\u0647\u0627 \u0627\u0637\u0644\u0627\u0639 \u062f\u0647\u062f \u06a9\u0647 \u06cc\u06a9 \u06a9\u0627\u0631\u0628\u0631 \u0639\u06a9\u0633\u06cc \u0631\u0627 \u0622\u067e\u0644\u0648\u062f \u06a9\u0631\u062f\u0647 \u0627\u0633\u062a.  \u0645\u0634\u062a\u0631\u06a9 \u062f\u06cc\u06af\u0631\u06cc \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0627\u0642\u062f\u0627\u0645 \u0631\u0627 \u062c\u0645\u0639 \u0622\u0648\u0631\u06cc \u06a9\u0646\u062f \u0648 \u0622\u0646\u0647\u0627 \u0631\u0627 \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0627\u0642\u06cc \u0628\u0645\u0627\u0646\u062f.<\/p>\n<p>\u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0645\u0633\u062a\u0642\u0644 \u0627\u0632 \u06cc\u06a9\u062f\u06cc\u06af\u0631 \u0647\u0633\u062a\u0646\u062f\u060c \u0627\u06af\u0631\u0686\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0648\u0627\u0628\u0633\u062a\u0647 \u0646\u06cc\u0632 \u0628\u0627\u0634\u0646\u062f.<\/p>\n<h2 id=\"whatisaneventemitter\"><span class=\"ez-toc-section\" id=\"event_emitter_%da%86%db%8c%d8%b3%d8%aa%d8%9f\"><\/span>Event Emitter \u0686\u06cc\u0633\u062a\u061f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0631\u0627 <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633 \u06cc\u06a9 \u06a9\u0644\u0627\u0633 \u062f\u0627\u062e\u0644\u06cc \u0627\u0633\u062a \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u0642\u0631\u0627\u0631 \u062f\u0627\u0631\u062f <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/nodejs.org\/api\/events.html\"><code>events<\/code><\/a>  \u0645\u062f\u0648\u0644.  \u0628\u0627 \u062a\u0648\u062c\u0647 \u0628\u0647 \u0645\u0633\u062a\u0646\u062f\u0627\u062a:<\/p>\n<blockquote>\n<p>\u0628\u062e\u0634 \u0639\u0645\u062f\u0647 \u0627\u06cc \u0627\u0632 Node.js \u0647\u0633\u062a\u0647 API \u062d\u0648\u0644 \u06cc\u06a9 \u0645\u0639\u0645\u0627\u0631\u06cc \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631 \u0627\u0635\u0637\u0644\u0627\u062d\u06cc \u0633\u0627\u062e\u062a\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u0627\u0646\u0648\u0627\u0639 \u062e\u0627\u0635\u06cc \u0627\u0632 \u0627\u0634\u06cc\u0627\u0621 (\u0645\u0648\u0633\u0648\u0645 \u0628\u0647 &#8220;\u0627\u0645\u06cc\u062a\u0631&#8221;) \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u0646\u0627\u0645\u06af\u0630\u0627\u0631\u06cc \u0634\u062f\u0647 \u0631\u0627 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u0646\u062f \u06a9\u0647 \u0628\u0627\u0639\u062b \u0645\u06cc \u0634\u0648\u062f <code>Function<\/code> \u0627\u0634\u06cc\u0627\u0621 (&#8220;\u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646&#8221;) \u06a9\u0647 \u0628\u0627\u06cc\u062f \u0641\u0631\u0627\u062e\u0648\u0627\u0646\u06cc \u0634\u0648\u0646\u062f&#8221;<\/p>\n<\/blockquote>\n<p>\u0627\u06cc\u0646 \u06a9\u0644\u0627\u0633 \u062a\u0627 \u062d\u062f\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0645\u06a9\u06cc \u0627\u0632 \u0645\u062f\u0644 pub\/sub \u062a\u0648\u0635\u06cc\u0641 \u0634\u0648\u062f \u0632\u06cc\u0631\u0627 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f <em>\u0633\u0627\u0637\u0639 \u06a9\u0646\u0646\u062f\u0647 \u0647\u0627\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f<\/em> (\u0646\u0627\u0634\u0631\u0627\u0646) \u0628\u0631\u0627\u06cc \u0627\u0646\u062a\u0634\u0627\u0631 <em>\u0645\u0646\u0627\u0633\u0628\u062a \u0647\u0627<\/em> (\u067e\u06cc\u0627\u0645 \u0647\u0627) \u0648 <em>\u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646<\/em> (\u0645\u0634\u062a\u0631\u06a9\u06cc\u0646) \u0627\u0642\u062f\u0627\u0645 \u06a9\u0646\u0646\u062f \u0631\u0648\u06cc \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 &#8211; \u0628\u0647 \u0631\u0648\u0634\u06cc \u0633\u0627\u062f\u0647.<\/p>\n<h2 id=\"creatingeventemitters\"><span class=\"ez-toc-section\" id=\"%d8%a7%db%8c%d8%ac%d8%a7%d8%af_eventemitters\"><\/span>\u0627\u06cc\u062c\u0627\u062f EventEmitters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u06af\u0641\u062a\u0647 \u0634\u062f\u060c \u0628\u06cc\u0627\u06cc\u06cc\u062f \u062c\u0644\u0648 \u0628\u0631\u0648\u06cc\u0645 \u0648 \u06cc\u06a9 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645 <code>EventEmitter<\/code>.  \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 \u0646\u0645\u0648\u0646\u0647 \u0627\u0632 \u062e\u0648\u062f \u06a9\u0644\u0627\u0633 \u06cc\u0627 \u0628\u0627 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0622\u0646 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u06cc\u06a9 \u06a9\u0644\u0627\u0633 \u0633\u0641\u0627\u0631\u0634\u06cc \u0648 \u0633\u067e\u0633 \u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 \u0646\u0645\u0648\u0646\u0647 \u0627\u0632 \u0622\u0646 \u06a9\u0644\u0627\u0633 \u0627\u0646\u062c\u0627\u0645 \u062f\u0627\u062f.<\/p>\n<h3 id=\"creatinganeventemitterobject\"><span class=\"ez-toc-section\" id=\"%d8%a7%db%8c%d8%ac%d8%a7%d8%af_%db%8c%da%a9_event_emitter_%d9%87%d8%af%d9%81_%e2%80%93_%d8%b4%db%8c\"><\/span>\u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 <em>Event Emitter<\/em> \u0647\u062f\u0641 &#8211; \u0634\u06cc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0627 \u06cc\u06a9 \u0634\u06cc \u0633\u0627\u0637\u0639 \u06a9\u0646\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0633\u0627\u062f\u0647 \u0634\u0631\u0648\u0639 \u06a9\u0646\u06cc\u0645.  \u0645\u0627 \u0627\u06cc\u062c\u0627\u062f \u062e\u0648\u0627\u0647\u06cc\u0645 \u06a9\u0631\u062f <code>EventEmitter<\/code> \u06a9\u0647 \u0647\u0631 \u062b\u0627\u0646\u06cc\u0647 \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u062d\u0627\u0648\u06cc \u0627\u0637\u0644\u0627\u0639\u0627\u062a\u06cc \u062f\u0631 \u0645\u0648\u0631\u062f \u0632\u0645\u0627\u0646 \u0622\u067e\u062f\u06cc\u062a \u0628\u0631\u0646\u0627\u0645\u0647 \u0627\u0633\u062a.<\/p>\n<p>\u0627\u0648\u0644\u06cc\u0646\u060c import \u0631\u0627 <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633 \u0627\u0632 <code>events<\/code> \u0645\u0627\u0698\u0648\u0644 \u0647\u0627:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> { EventEmitter } = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'events'<\/span>);\n<\/code><\/pre>\n<p>\u0633\u067e\u0633 \u0628\u06cc\u0627\u06cc\u06cc\u062f \u06cc\u06a9 \u0631\u0627 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645 <code>EventEmitter<\/code>:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> timerEventEmitter = <span class=\"hljs-keyword\">new<\/span> EventEmitter();\n<\/code><\/pre>\n<p>\u0627\u0646\u062a\u0634\u0627\u0631 \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u0632 \u0627\u06cc\u0646 \u0634\u06cc \u0628\u0647 \u0647\u0645\u06cc\u0646 \u0633\u0627\u062f\u06af\u06cc \u0627\u0633\u062a:<\/p>\n<pre><code class=\"hljs\">timerEventEmitter.emit(<span class=\"hljs-string\">\"update\"<\/span>);\n<\/code><\/pre>\n<p>\u0645\u0627 \u0646\u0627\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0645\u0634\u062e\u0635 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 \u0648 \u0622\u0646 \u0631\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u0646\u062a\u0634\u0631 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645.  \u0647\u06cc\u0686 \u0627\u062a\u0641\u0627\u0642\u06cc \u0646\u0645\u06cc \u0627\u0641\u062a\u062f \u0632\u06cc\u0631\u0627 \u0647\u06cc\u0686 \u0634\u0646\u0648\u0646\u062f\u0647 \u0627\u06cc \u0628\u0631\u0627\u06cc \u0648\u0627\u06a9\u0646\u0634 \u0628\u0647 \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u0648\u062c\u0648\u062f \u0646\u062f\u0627\u0631\u062f.  \u0628\u06cc\u0627\u06cc\u06cc\u062f \u06a9\u0627\u0631\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u0647\u0631 \u062b\u0627\u0646\u06cc\u0647 \u062a\u06a9\u0631\u0627\u0631 \u0634\u0648\u062f.<\/p>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <code>setInterval()<\/code> \u0631\u0648\u0634\u060c \u06cc\u06a9 \u062a\u0627\u06cc\u0645\u0631 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u062f <code>update<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u062f\u0631 \u0647\u0631 \u062b\u0627\u0646\u06cc\u0647:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">let<\/span> currentTime = <span class=\"hljs-number\">0<\/span>;\n\n<span class=\"hljs-comment\">\/\/ This will trigger the update event each passing second<\/span>\n<span class=\"hljs-built_in\">setInterval<\/span>(<span class=\"hljs-function\">() =&gt;<\/span> {\n    currentTime++;\n    timerEventEmitter.emit(<span class=\"hljs-string\">'update'<\/span>, currentTime);\n}, <span class=\"hljs-number\">1000<\/span>);\n<\/code><\/pre>\n<p>\u0631\u0627 <code>EventEmitter<\/code> \u0646\u0645\u0648\u0646\u0647 \u06cc\u06a9 \u0646\u0627\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f \u0648 \u06cc\u06a9 \u0645\u062c\u0645\u0648\u0639\u0647 \u062f\u0644\u062e\u0648\u0627\u0647 \u0627\u0632 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u0647\u0627 \u0631\u0627 \u0645\u06cc \u067e\u0630\u06cc\u0631\u062f.  \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0648\u0631\u062f\u060c \u0645\u0627 \u06af\u0630\u0634\u062a <code>eventName<\/code> \u0645\u0627\u0646\u0646\u062f <code>update<\/code> \u0648 <code>currentTime<\/code> \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0632\u0645\u0627\u0646 \u0627\u0632 \u0634\u0631\u0648\u0639 \u0628\u0631\u0646\u0627\u0645\u0647.<\/p>\n<p>\u0645\u0627 \u0627\u0645\u06cc\u062a\u0631 \u0631\u0627 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0641\u0639\u0627\u0644 \u0645\u06cc \u06a9\u0646\u06cc\u0645 <code>emit()<\/code> \u0631\u0648\u0634\u060c \u06a9\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0628\u0627 \u0627\u0637\u0644\u0627\u0639\u0627\u062a\u06cc \u06a9\u0647 \u0645\u0627 \u0627\u0631\u0627\u0626\u0647 \u06a9\u0631\u062f\u0647\u200c\u0627\u06cc\u0645 \u067e\u06cc\u0634 \u0645\u06cc\u200c\u0628\u0631\u062f.<\/p>\n<p>\u0628\u0627 \u0622\u0645\u0627\u062f\u0647 \u0634\u062f\u0646 \u067e\u062e\u0634 \u06a9\u0646\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u0628\u06cc\u0627\u06cc\u06cc\u062f \u06cc\u06a9 \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u062f\u0631 \u0622\u0646 \u0645\u0634\u062a\u0631\u06a9 \u06a9\u0646\u06cc\u0645:<\/p>\n<pre><code class=\"hljs\">timerEventEmitter.\u0631\u0648\u06cc(<span class=\"hljs-string\">'update'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">time<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Message Received from publisher'<\/span>);\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`<span class=\"hljs-subst\">${time}<\/span> seconds passed since the program started`<\/span>);\n});\n<\/code><\/pre>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <code>\u0631\u0648\u06cc()<\/code> \u0631\u0648\u0634\u060c \u0627\u0631\u0633\u0627\u0644 \u0646\u0627\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f \u0628\u0631\u0627\u06cc \u062a\u0639\u06cc\u06cc\u0646 \u0627\u06cc\u0646\u06a9\u0647 \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0627 \u0628\u0647 \u06a9\u062f\u0627\u0645 \u06cc\u06a9 \u0645\u062a\u0635\u0644 \u06a9\u0646\u06cc\u0645\u060c \u0628\u0647 \u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc\u200c\u062f\u0647\u062f \u0634\u0646\u0648\u0646\u062f\u0647 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645. <em>\u0628\u0631<\/em> \u0631\u0627 <code>update<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u0645\u062a\u062f\u06cc \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u0632\u0645\u0627\u0646 \u0631\u0627 \u062b\u0628\u062a \u0645\u06cc \u06a9\u0646\u062f.  \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627\u0631\u0647\u0627 \u0648 \u0628\u0627\u0631\u0647\u0627 \u0647\u0645\u0627\u0646 \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0627 \u0627\u0636\u0627\u0641\u0647 \u06a9\u0646\u06cc\u062f \u0648 \u0647\u0631 \u06a9\u062f\u0627\u0645 \u0645\u0634\u062a\u0631\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0634\u0648\u0646\u062f.<\/p>\n<p>\u0627\u0633\u062a\u062f\u0644\u0627\u0644 \u062f\u0648\u0645 \u0627\u0632 <code>\u0631\u0648\u06cc()<\/code> \u062a\u0627\u0628\u0639 \u06cc\u06a9 \u062a\u0645\u0627\u0633 \u0628\u0631\u06af\u0634\u062a\u06cc \u0627\u0633\u062a \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0647\u0631 \u062a\u0639\u062f\u0627\u062f \u0627\u0632 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0627\u0636\u0627\u0641\u06cc \u0631\u0627 \u06a9\u0647 \u062a\u0648\u0633\u0637 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u0646\u062a\u0634\u0631 \u0634\u062f\u0647 \u0627\u0633\u062a \u0631\u0627 \u0628\u067e\u0630\u06cc\u0631\u062f.  \u0647\u0631 \u0634\u0646\u0648\u0646\u062f\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u067e\u0633 \u0627\u0632 \u062d\u0641\u0638 \u0633\u0641\u0627\u0631\u0634\u060c \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0645\u0648\u0631\u062f \u0646\u0638\u0631 \u062e\u0648\u062f \u0631\u0627 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0646\u062f.<\/p>\n<p>\u0627\u062c\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0628\u0627\u06cc\u062f \u0646\u062a\u06cc\u062c\u0647 \u062f\u0647\u062f:<\/p>\n<pre><code class=\"hljs\">Message Received from publisher\n1 seconds passed since the program started\nMessage Received from publisher\n2 seconds passed since the program started\nMessage Received from publisher\n3 seconds passed since the program started\n...\n<\/code><\/pre>\n<p>\u062f\u0631 \u0645\u0642\u0627\u0628\u0644\u060c \u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645 <code>once()<\/code> \u0631\u0648\u0634 \u0627\u0634\u062a\u0631\u0627\u06a9 &#8211; \u0627\u06af\u0631 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u062f \u0686\u06cc\u0632\u06cc \u0631\u0627 \u0641\u0642\u0637 \u062f\u0631 \u0627\u0648\u0644\u06cc\u0646 \u0628\u0627\u0631\u06cc \u06a9\u0647 \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627\u0647\u200c\u0627\u0646\u062f\u0627\u0632\u06cc \u0645\u06cc\u200c\u06a9\u0646\u062f \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f:<\/p>\n<pre><code class=\"hljs\">timerEventEmitter.once(<span class=\"hljs-string\">'update'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">time<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Message Received from publisher'<\/span>);\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`<span class=\"hljs-subst\">${time}<\/span> seconds passed since the program started`<\/span>);\n});\n<\/code><\/pre>\n<p>\u0628\u0627 \u0627\u062c\u0631\u0627\u06cc \u0627\u06cc\u0646 \u06a9\u062f \u0628\u0647 \u062f\u0633\u062a \u0645\u06cc \u0622\u06cc\u062f:<\/p>\n<pre><code class=\"hljs\">Message Received from publisher\n1 seconds passed since the program started\n<\/code><\/pre>\n<h3 id=\"eventemitterwithmultiplelisteners\"><span class=\"ez-toc-section\" id=\"event_emitter_%d8%a8%d8%a7_%da%86%d9%86%d8%af%db%8c%d9%86_%d8%b4%d9%86%d9%88%d9%86%d8%af%d9%87\"><\/span><em>Event Emitter<\/em> \u0628\u0627 \u0686\u0646\u062f\u06cc\u0646 \u0634\u0646\u0648\u0646\u062f\u0647<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u062d\u0627\u0644\u0627 \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0627 \u0633\u0647 \u0634\u0646\u0648\u0646\u062f\u0647\u060c \u0646\u0648\u0639 \u0645\u062a\u0641\u0627\u0648\u062a\u06cc \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u0646\u062a\u0634\u0631 \u06a9\u0646\u06cc\u0645.  \u0627\u06cc\u0646 \u06cc\u06a9 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f.  \u06cc\u06a9 \u0634\u0646\u0648\u0646\u062f\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0631\u0627 \u0628\u0647 \u0631\u0648\u0632 \u0645\u06cc \u06a9\u0646\u062f \u0631\u0648\u06cc \u062f\u0631 \u0647\u0631 \u062b\u0627\u0646\u06cc\u0647\u060c \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 \u0628\u0647 \u067e\u0627\u06cc\u0627\u0646 \u0645\u06cc \u0631\u0633\u062f\u060c \u06cc\u06a9 \u0634\u0646\u0648\u0646\u062f\u0647 \u0628\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0627\u0637\u0644\u0627\u0639 \u0645\u06cc \u062f\u0647\u062f \u0648 \u067e\u0633 \u0627\u0632 \u067e\u0627\u06cc\u0627\u0646 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633\u060c \u0622\u062e\u0631\u06cc\u0646 \u0634\u0646\u0648\u0646\u062f\u0647 \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f:<\/p>\n<ul>\n<li><code>update<\/code>  &#8211; \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u0622\u063a\u0627\u0632 \u062e\u0648\u0627\u0647\u062f \u0634\u062f \u0631\u0648\u06cc \u062f\u0631 \u0647\u0631 \u062b\u0627\u0646\u06cc\u0647<\/li>\n<li><code>end<\/code>  &#8211; \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u062f\u0631 \u067e\u0627\u06cc\u0627\u0646 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f<\/li>\n<li><code>end-soon<\/code>  &#8211; \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f 2 \u062b\u0627\u0646\u06cc\u0647 \u0642\u0628\u0644 \u0627\u0632 \u067e\u0627\u06cc\u0627\u0646 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f<\/li>\n<\/ul>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u062a\u0627\u0628\u0639\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f-\u0627\u0645\u06cc\u062a\u0631 \u0631\u0627 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0631\u062f\u0647 \u0648 \u0622\u0646 \u0631\u0627 \u0628\u0631\u06af\u0631\u062f\u0627\u0646\u062f:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> countDown = <span class=\"hljs-function\">(<span class=\"hljs-params\">countdownTime<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-keyword\">const<\/span> eventEmitter = <span class=\"hljs-keyword\">new<\/span> EventEmitter();\n\n    <span class=\"hljs-keyword\">let<\/span> currentTime = <span class=\"hljs-number\">0<\/span>;\n\n    <span class=\"hljs-comment\">\/\/ This will trigger the update event each passing second<\/span>\n    <span class=\"hljs-keyword\">const<\/span> timer = <span class=\"hljs-built_in\">setInterval<\/span>(<span class=\"hljs-function\">() =&gt;<\/span> {\n        currentTime++;\n        eventEmitter.emit(<span class=\"hljs-string\">'update'<\/span>, currentTime);\n\n        <span class=\"hljs-comment\">\/\/ Check if countdown has reached to the end<\/span>\n        <span class=\"hljs-keyword\">if<\/span> (currentTime === countdownTime) {\n            <span class=\"hljs-built_in\">clearInterval<\/span>(timer);\n            eventEmitter.emit(<span class=\"hljs-string\">'end'<\/span>);\n        }\n\n        <span class=\"hljs-comment\">\/\/ Check if countdown will end in 2 seconds<\/span>\n        <span class=\"hljs-keyword\">if<\/span> (currentTime === countdownTime - <span class=\"hljs-number\">2<\/span>) {\n            eventEmitter.emit(<span class=\"hljs-string\">'end-soon'<\/span>);\n        }\n    }, <span class=\"hljs-number\">1000<\/span>);\n    <span class=\"hljs-keyword\">return<\/span> eventEmitter;\n};\n<\/code><\/pre>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u062a\u0627\u0628\u0639\u060c \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0628\u0627\u0632\u0647 \u0631\u0627 \u0634\u0631\u0648\u0639 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 \u06a9\u0647 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f <code>update<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u062f\u0631 \u0641\u0627\u0635\u0644\u0647 \u0632\u0645\u0627\u0646\u06cc \u06cc\u06a9 \u062b\u0627\u0646\u06cc\u0647<\/p>\n<p>\u062f\u0631 \u0627\u0628\u062a\u062f\u0627 <code>if<\/code> \u062f\u0631 \u0634\u0631\u0627\u06cc\u0637\u060c \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0622\u06cc\u0627 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 \u0628\u0647 \u067e\u0627\u06cc\u0627\u0646 \u0631\u0633\u06cc\u062f\u0647 \u0627\u0633\u062a \u0648 \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0641\u0627\u0635\u0644\u0647 \u0631\u0627 \u0645\u062a\u0648\u0642\u0641 \u0645\u06cc \u06a9\u0646\u06cc\u0645.  \u0627\u06af\u0631 \u0686\u0646\u06cc\u0646 \u0627\u0633\u062a\u060c \u0645\u0627 \u06cc\u06a9 \u0631\u0627 \u0634\u0644\u06cc\u06a9 \u0645\u06cc \u06a9\u0646\u06cc\u0645 <code>end<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f.<\/p>\n<p>\u062f\u0631 \u0634\u0631\u0637 \u062f\u0648\u0645\u060c \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0622\u06cc\u0627 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 2 \u062b\u0627\u0646\u06cc\u0647 \u062a\u0627 \u067e\u0627\u06cc\u0627\u0646 \u0628\u0627\u0642\u06cc \u0645\u0627\u0646\u062f\u0647 \u0627\u0633\u062a \u06cc\u0627 \u062e\u06cc\u0631\u060c \u0648 \u0622\u0646 \u0631\u0627 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u06cc\u0645 <code>end-soon<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u06af\u0631 \u0686\u0646\u06cc\u0646 \u0627\u0633\u062a.<\/p>\n<p>\u0627\u06a9\u0646\u0648\u0646\u060c \u0627\u062c\u0627\u0632\u0647 \u062f\u0647\u06cc\u062f \u0686\u0646\u062f \u0645\u0634\u062a\u0631\u06a9 \u0631\u0627 \u0628\u0647 \u0627\u06cc\u0646 \u0627\u0645\u06cc\u062a\u0631 \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u0636\u0627\u0641\u0647 \u06a9\u0646\u06cc\u0645:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> myCountDown = countDown(<span class=\"hljs-number\">5<\/span>);\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'update'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">t<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`<span class=\"hljs-subst\">${t}<\/span> seconds since the timer started`<\/span>);\n});\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Countdown is completed'<\/span>);\n});\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end-soon'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Count down will end in 2 seconds'<\/span>);\n});\n<\/code><\/pre>\n<p>\u0627\u06cc\u0646 \u06a9\u062f \u0628\u0627\u06cc\u062f \u0646\u062a\u06cc\u062c\u0647 \u062f\u0647\u062f:<\/p>\n<pre><code class=\"hljs\">1 seconds has been passed since the timer started\n2 seconds has been passed since the timer started\n3 seconds has been passed since the timer started\nCount down will end in 2 seconds\n4 seconds has been passed since the timer started\n5 seconds has been passed since the timer started\nCountdown is completed\n<\/code><\/pre>\n<h3 id=\"extendingeventemitter\"><span class=\"ez-toc-section\" id=\"%d8%af%d8%b1_%d8%ad%d8%a7%d9%84_%d8%aa%d9%85%d8%af%db%8c%d8%af_event_emitter\"><\/span>\u062f\u0631 \u062d\u0627\u0644 \u062a\u0645\u062f\u06cc\u062f <em>Event Emitter<\/em><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0628\u062e\u0634\u060c \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0627 \u06af\u0633\u062a\u0631\u0634 \u062f\u0627\u062f\u0646 \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f Emitter \u0628\u0627 \u0647\u0645\u0627\u0646 \u0639\u0645\u0644\u06a9\u0631\u062f \u0628\u0633\u0627\u0632\u06cc\u0645 <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633  \u0627\u0628\u062a\u062f\u0627 a \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f <code>CountDown<\/code> \u06a9\u0644\u0627\u0633\u06cc \u06a9\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0631\u0627 \u0645\u062f\u06cc\u0631\u06cc\u062a \u062e\u0648\u0627\u0647\u062f \u06a9\u0631\u062f:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> { EventEmitter } = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'events'<\/span>);\n\n<span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">CountDown<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title\">EventEmitter<\/span> <\/span>{\n    <span class=\"hljs-function\"><span class=\"hljs-title\">constructor<\/span>(<span class=\"hljs-params\">countdownTime<\/span>)<\/span> {\n        <span class=\"hljs-built_in\">super<\/span>();\n        <span class=\"hljs-built_in\">this<\/span>.countdownTime = countdownTime;\n        <span class=\"hljs-built_in\">this<\/span>.currentTime = <span class=\"hljs-number\">0<\/span>;\n    }\n\n    <span class=\"hljs-function\"><span class=\"hljs-title\">startTimer<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> {\n        <span class=\"hljs-keyword\">const<\/span> timer = <span class=\"hljs-built_in\">setInterval<\/span>(<span class=\"hljs-function\">() =&gt;<\/span> {\n            <span class=\"hljs-built_in\">this<\/span>.currentTime++;\n            <span class=\"hljs-built_in\">this<\/span>.emit(<span class=\"hljs-string\">'update'<\/span>, <span class=\"hljs-built_in\">this<\/span>.currentTime);\n    \n            <span class=\"hljs-comment\">\/\/ Check if countdown has reached to the end<\/span>\n            <span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-built_in\">this<\/span>.currentTime === <span class=\"hljs-built_in\">this<\/span>.countdownTime) {\n                <span class=\"hljs-built_in\">clearInterval<\/span>(timer);\n                <span class=\"hljs-built_in\">this<\/span>.emit(<span class=\"hljs-string\">'end'<\/span>);\n            }\n    \n            <span class=\"hljs-comment\">\/\/ Check if countdown will end in 2 seconds<\/span>\n            <span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-built_in\">this<\/span>.currentTime === <span class=\"hljs-built_in\">this<\/span>.countdownTime - <span class=\"hljs-number\">2<\/span>) {\n                <span class=\"hljs-built_in\">this<\/span>.emit(<span class=\"hljs-string\">'end-soon'<\/span>);\n            }\n        }, <span class=\"hljs-number\">1000<\/span>);\n    }\n}\n<\/code><\/pre>\n<p>\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0645\u06cc \u0628\u06cc\u0646\u06cc\u062f\u060c \u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645 <code>this.emit()<\/code> \u062f\u0627\u062e\u0644 \u06a9\u0644\u0627\u0633 \u0645\u0633\u062a\u0642\u06cc\u0645  \u0647\u0645\u0686\u0646\u06cc\u0646 <code>startTimer()<\/code> \u0627\u0632 \u062a\u0627\u0628\u0639 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f \u062a\u0627 \u0628\u0647 \u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u06a9\u0646\u062a\u0631\u0644 \u0632\u0645\u0627\u0646 \u0634\u0631\u0648\u0639 \u0634\u0645\u0627\u0631\u0634 \u0645\u0639\u06a9\u0648\u0633 \u0631\u0627 \u0628\u062f\u0647\u062f.  \u062f\u0631 \u063a\u06cc\u0631 \u0627\u06cc\u0646 \u0635\u0648\u0631\u062a\u060c \u0628\u0647 \u0645\u062d\u0636 \u0627\u06cc\u062c\u0627\u062f \u0634\u06cc \u0634\u0631\u0648\u0639 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u06cc\u06a9 \u0634\u06cc \u062c\u062f\u06cc\u062f \u0627\u0632 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645 <code>CountDown<\/code> \u0648 \u062f\u0631 \u0622\u0646 \u0645\u0634\u062a\u0631\u06a9 \u0634\u0648\u06cc\u062f:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> myCountDown = <span class=\"hljs-keyword\">new<\/span> CountDown(<span class=\"hljs-number\">5<\/span>);\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'update'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">t<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`<span class=\"hljs-subst\">${t}<\/span> seconds has been passed since the timer started`<\/span>);\n});\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Countdown is completed'<\/span>);\n});\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end-soon'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Count down will be end in 2 seconds'<\/span>);\n});\n\nmyCountDown.startTimer();\n<\/code><\/pre>\n<p>\u0627\u062c\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0628\u0647 \u0627\u06cc\u0646 \u0646\u062a\u06cc\u062c\u0647 \u0645\u06cc \u0631\u0633\u062f:<\/p>\n<pre><code class=\"hljs\">1 seconds has been passed since the timer started\n2 seconds has been passed since the timer started\n3 seconds has been passed since the timer started\nCount down will be end in 2 seconds\n4 seconds has been passed since the timer started\n5 seconds has been passed since the timer started\nCountdown is completed\n<\/code><\/pre>\n<p>\u06cc\u06a9 <em>\u0646\u0627\u0645 \u0645\u0633\u062a\u0639\u0627\u0631<\/em> \u0628\u0631\u0627\u06cc <code>\u0631\u0648\u06cc()<\/code> \u062a\u0627\u0628\u0639 \u0627\u0633\u062a <code>addListener()<\/code>.  \u062f\u0631 \u0646\u0638\u0631 \u0628\u06af\u06cc\u0631\u06cc\u062f <code>end-soon<\/code> \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f:<\/p>\n<pre><code class=\"hljs\">myCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end-soon'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Count down will be end in 2 seconds'<\/span>);\n});\n<\/code><\/pre>\n<p>\u0645\u0627 \u0647\u0645 \u0645\u06cc \u062a\u0648\u0627\u0646\u0633\u062a\u06cc\u0645 \u0647\u0645\u06cc\u0646 \u06a9\u0627\u0631 \u0631\u0627 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u0645 <code>addListener()<\/code> \u0645\u062b\u0644 \u0627\u06cc\u0646:<\/p>\n<pre><code class=\"hljs\">myCountDown.addListener(<span class=\"hljs-string\">'end-soon'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Count down will be end in 2 seconds'<\/span>);\n});\n<\/code><\/pre>\n<p>\u0647\u0631 \u062f\u0648 \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u0646\u062f.  \u0622\u0646\u0647\u0627 \u062a\u0642\u0631\u06cc\u0628\u0627\u064b \u0645\u0627\u0646\u0646\u062f \u0645\u062a\u0631\u0627\u062f\u0641 \u0647\u0633\u062a\u0646\u062f.  \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u0627\u06a9\u062b\u0631 \u06a9\u062f\u0646\u0648\u06cc\u0633\u0627\u0646 \u062a\u0631\u062c\u06cc\u062d \u0645\u06cc \u062f\u0647\u0646\u062f \u0627\u0632 \u0622\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u0646\u062f <code>\u0631\u0648\u06cc()<\/code>.<\/p>\n<h2 id=\"importantfunctionsofeventemitter\"><span class=\"ez-toc-section\" id=\"%d8%aa%d9%88%d8%a7%d8%a8%d8%b9_%d9%85%d9%87%d9%85_%d8%a7%d8%b2_event_emitter\"><\/span>\u062a\u0648\u0627\u0628\u0639 \u0645\u0647\u0645 \u0627\u0632 <em>Event Emitter<\/em><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0647 \u0628\u0631\u062e\u06cc \u0627\u0632 \u0639\u0645\u0644\u06a9\u0631\u062f\u0647\u0627\u06cc \u0645\u0647\u0645\u06cc \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645 \u0646\u06af\u0627\u0647\u06cc \u0628\u06cc\u0646\u062f\u0627\u0632\u06cc\u0645 \u0631\u0648\u06cc <code>EventEmitter<\/code>\u0633<\/p>\n<h3 id=\"eventnames\"><span class=\"ez-toc-section\" id=\"%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%afnames\"><\/span><em>\u0631\u0648\u06cc\u062f\u0627\u062fNames()<\/em><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0627\u06cc\u0646 \u062a\u0627\u0628\u0639 \u0647\u0645\u0647 \u0646\u0627\u0645\u200c\u0647\u0627\u06cc \u0634\u0646\u0648\u0646\u062f\u0647 \u0641\u0639\u0627\u0644 \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u0622\u0631\u0627\u06cc\u0647 \u0628\u0631\u0645\u06cc\u200c\u06af\u0631\u062f\u0627\u0646\u062f:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> myCountDown = <span class=\"hljs-keyword\">new<\/span> CountDown(<span class=\"hljs-number\">5<\/span>);\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'update'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">t<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`<span class=\"hljs-subst\">${t}<\/span> seconds has been passed since the timer started`<\/span>);\n});\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Countdown is completed'<\/span>);\n});\n\nmyCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'end-soon'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Count down will be end in 2 seconds'<\/span>);\n});\n\n<span class=\"hljs-built_in\">console<\/span>.log(myCountDown.eventNames());\n<\/code><\/pre>\n<p>\u0627\u062c\u0631\u0627\u06cc \u0627\u06cc\u0646 \u06a9\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0645\u0648\u0627\u0631\u062f \u0632\u06cc\u0631 \u0645\u06cc \u0634\u0648\u062f:<\/p>\n<pre><code class=\"hljs\">( 'update', 'end', 'end-soon' )\n<\/code><\/pre>\n<p>\u0627\u06af\u0631 \u0642\u0631\u0627\u0631 \u0628\u0648\u062f \u062f\u0631 \u0631\u0648\u06cc\u062f\u0627\u062f \u062f\u06cc\u06af\u0631\u06cc \u0645\u0634\u062a\u0631\u06a9 \u0634\u0648\u06cc\u0645 \u0645\u0627\u0646\u0646\u062f <code>myCount.\u0631\u0648\u06cc('some-event', ...)<\/code>\u060c \u0631\u0648\u06cc\u062f\u0627\u062f \u062c\u062f\u06cc\u062f \u0646\u06cc\u0632 \u0628\u0647 \u0622\u0631\u0627\u06cc\u0647 \u0627\u0636\u0627\u0641\u0647 \u062e\u0648\u0627\u0647\u062f \u0634\u062f.<\/p>\n<p>\u0628\u0647 \u062e\u0627\u0637\u0631 \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u062f \u06a9\u0647 \u0627\u06cc\u0646 \u0631\u0648\u0634 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u0645\u0646\u062a\u0634\u0631 \u0634\u062f\u0647 \u0631\u0627 \u0628\u0631 \u0646\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u062f.  \u0641\u0647\u0631\u0633\u062a\u06cc \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u0645\u0634\u062a\u0631\u06a9 \u0634\u062f\u0647 \u0627\u0646\u062f \u0631\u0627 \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u062f.<\/p>\n<h3 id=\"removelistener\"><span class=\"ez-toc-section\" id=\"removelistener\"><\/span><em>removeListener()<\/em><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0627\u0632 \u0646\u0627\u0645 \u0622\u0646 \u067e\u06cc\u062f\u0627\u0633\u062a\u060c \u0627\u06cc\u0646 \u062a\u0627\u0628\u0639 \u06cc\u06a9 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u0646\u062f\u0647 \u0645\u0634\u062a\u0631\u06a9 \u0631\u0627 \u0627\u0632 \u06cc\u06a9 \u062d\u0630\u0641 \u0645\u06cc \u06a9\u0646\u062f <code>EventEmitter<\/code>:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> { EventEmitter } = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'events'<\/span>);\n\n<span class=\"hljs-keyword\">const<\/span> emitter = <span class=\"hljs-keyword\">new<\/span> EventEmitter();\n\n<span class=\"hljs-keyword\">const<\/span> f1 = <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'f1 Triggered'<\/span>);\n}\n\n<span class=\"hljs-keyword\">const<\/span> f2 = <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'f2 Triggered'<\/span>);\n}\n\nemitter.\u0631\u0648\u06cc(<span class=\"hljs-string\">'some-event'<\/span>, f1);\nemitter.\u0631\u0648\u06cc(<span class=\"hljs-string\">'some-event'<\/span>, f2);\n\nemitter.emit(<span class=\"hljs-string\">'some-event'<\/span>);\n\nemitter.removeListener(<span class=\"hljs-string\">'some-event'<\/span>, f1);\n\nemitter.emit(<span class=\"hljs-string\">'some-event'<\/span>);\n<\/code><\/pre>\n<p>\u067e\u0633 \u0627\u0632 \u0634\u0631\u0648\u0639 \u0627\u0648\u0644\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u0632\u06cc\u0631\u0627 \u0647\u0631 \u062f\u0648 <code>f1<\/code> \u0648 <code>f2<\/code> \u0641\u0639\u0627\u0644 \u0647\u0633\u062a\u0646\u062f &#8211; \u0647\u0631 \u062f\u0648 \u062a\u0627\u0628\u0639 \u0627\u062c\u0631\u0627 \u062e\u0648\u0627\u0647\u0646\u062f \u0634\u062f.  \u067e\u0633 \u0627\u0632 \u0622\u0646\u060c \u0645\u0627 \u062d\u0630\u0641 \u0634\u062f\u0647 \u0627\u0633\u062a <code>f1<\/code> \u0627\u0632 <code>EventEmitter<\/code>.  \u0641\u0642\u0637 \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u062f\u0648\u0628\u0627\u0631\u0647 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u06cc\u0645 <code>f2<\/code> \u0627\u062c\u0631\u0627 \u062e\u0648\u0627\u0647\u062f \u06a9\u0631\u062f:<\/p>\n<pre><code class=\"hljs\">f1 Triggered\nf2 Triggered\nf2 Triggered\n<\/code><\/pre>\n<p>\u06cc\u06a9 <em>\u0646\u0627\u0645 \u0645\u0633\u062a\u0639\u0627\u0631<\/em> \u0628\u0631\u0627\u06cc <code>removeListener()<\/code> \u0627\u0633\u062a <code>off()<\/code>.  \u0645\u062b\u0644\u0627\u064b \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0633\u062a\u06cc\u0645 \u0628\u0646\u0648\u06cc\u0633\u06cc\u0645:<\/p>\n<pre><code class=\"hljs\">emitter.removeListener(<span class=\"hljs-string\">'some-event'<\/span>, f1);\n<\/code><\/pre>\n<p>\u0645\u0627\u0646\u0646\u062f:<\/p>\n<pre><code class=\"hljs\">emitter.off(<span class=\"hljs-string\">'some-event'<\/span>, f1);\n<\/code><\/pre>\n<p>\u0647\u0631 \u062f\u0648 \u0627\u062b\u0631 \u06cc\u06a9\u0633\u0627\u0646\u06cc \u062f\u0627\u0631\u0646\u062f.<\/p>\n<h3 id=\"removealllisteners\"><span class=\"ez-toc-section\" id=\"removealllisteners\"><\/span><em>removeAllListeners()<\/em><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0628\u0627\u0632 \u0647\u0645 \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0627\u0632 \u0646\u0627\u0645 \u0622\u0646 \u067e\u06cc\u062f\u0627\u0633\u062a &#8211; \u0627\u06cc\u0646 \u062a\u0627\u0628\u0639 \u0647\u0645\u0647 \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0627 \u0627\u0632 \u062a\u0645\u0627\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc an \u062d\u0630\u0641 \u0645\u06cc \u06a9\u0646\u062f <code>EventEmitter<\/code>:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> { EventEmitter } = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'events'<\/span>);\n\n<span class=\"hljs-keyword\">const<\/span> emitter = <span class=\"hljs-keyword\">new<\/span> EventEmitter();\n\n<span class=\"hljs-keyword\">const<\/span> f1 = <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'f1 Triggered'<\/span>);\n}\n\n<span class=\"hljs-keyword\">const<\/span> f2 = <span class=\"hljs-function\">() =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'f2 Triggered'<\/span>);\n}\n\nemitter.\u0631\u0648\u06cc(<span class=\"hljs-string\">'some-event'<\/span>, f1);\nemitter.\u0631\u0648\u06cc(<span class=\"hljs-string\">'some-event'<\/span>, f2);\n\nemitter.emit(<span class=\"hljs-string\">'some-event'<\/span>);\n\nemitter.removeAllListeners();\n\nemitter.emit(<span class=\"hljs-string\">'some-event'<\/span>);\n<\/code><\/pre>\n<p>\u0627\u0648\u0644\u06cc\u0646 <code>emit()<\/code> \u0647\u0631 \u062f\u0648 \u0631\u0627 \u0627\u062e\u0631\u0627\u062c \u062e\u0648\u0627\u0647\u062f \u06a9\u0631\u062f <code>f1<\/code> \u0648 <code>f2<\/code> \u0627\u0632 \u0622\u0646\u062c\u0627\u06cc\u06cc \u06a9\u0647 \u0622\u0646\u0647\u0627 \u062f\u0631 \u0622\u0646 \u0632\u0645\u0627\u0646 \u0641\u0639\u0627\u0644 \u0647\u0633\u062a\u0646\u062f.  \u067e\u0633 \u0627\u0632 \u062d\u0630\u0641 \u0622\u0646\u0647\u0627\u060c <code>emit()<\/code> \u062a\u0627\u0628\u0639 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0627\u0645\u0627 \u0647\u06cc\u0686 \u0634\u0646\u0648\u0646\u062f\u0647 \u0627\u06cc \u0628\u0647 \u0622\u0646 \u067e\u0627\u0633\u062e \u0646\u0645\u06cc \u062f\u0647\u062f:<\/p>\n<pre><code class=\"hljs\">f1 Triggered\nf2 Triggered\n<\/code><\/pre>\n<h2 id=\"errorhandling\"><span class=\"ez-toc-section\" id=\"%d8%b1%d8%b3%db%8c%d8%af%da%af%db%8c_%d8%a8%d9%87_%d8%ae%d8%b7%d8%a7\"><\/span>\u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u062e\u0637\u0627<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06af\u0631 \u0645\u06cc \u062e\u0648\u0627\u0647\u06cc\u062f \u0628\u0627 \u062e\u0648\u062f \u062e\u0637\u0627\u06cc\u06cc \u0635\u0627\u062f\u0631 \u06a9\u0646\u06cc\u062f <code>EventEmitter<\/code>\u060c \u0628\u0627\u06cc\u062f \u0628\u0627 \u06cc\u06a9 \u0627\u0646\u062c\u0627\u0645 \u0634\u0648\u062f <code>error<\/code> \u0646\u0627\u0645 \u0631\u062e\u062f\u0627\u062f.  \u0627\u06cc\u0646 \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u0628\u0631\u0627\u06cc \u0647\u0645\u0647 \u0627\u0633\u062a <code>EventEmitter<\/code> \u0627\u0634\u06cc\u0627\u0621 \u062f\u0631 Node.js.  \u0627\u06cc\u0646 \u0631\u062e\u062f\u0627\u062f <em>\u0628\u0627\u06cc\u062f<\/em> \u0647\u0645\u0686\u0646\u06cc\u0646 \u0628\u0627 \u06cc\u06a9 <code>Error<\/code> \u0647\u062f\u0641 &#8211; \u0634\u06cc.  \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644\u060c \u06cc\u06a9 \u0631\u0648\u06cc\u062f\u0627\u062f \u062e\u0637\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u0645\u0646\u062a\u0634\u0631 \u0634\u0648\u062f:<\/p>\n<pre><code class=\"hljs\">myEventEmitter.emit(<span class=\"hljs-string\">'error'<\/span>, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">Error<\/span>(<span class=\"hljs-string\">'Something bad happened'<\/span>));\n<\/code><\/pre>\n<p>\u0647\u0631 \u0634\u0646\u0648\u0646\u062f\u0647 \u0627\u06cc \u0628\u0631\u0627\u06cc <code>error<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u0628\u0627\u06cc\u062f \u06cc\u06a9 callback \u0628\u0627 \u06cc\u06a9 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u0628\u0631\u0627\u06cc \u06af\u0631\u0641\u062a\u0646 \u0622\u0646 \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f <code>Error<\/code> \u0627\u0639\u062a\u0631\u0627\u0636 \u06a9\u0646\u06cc\u062f \u0648 \u0628\u0627 \u0645\u0647\u0631\u0628\u0627\u0646\u06cc \u0622\u0646 \u0631\u0627 \u0627\u062f\u0627\u0631\u0647 \u06a9\u0646\u06cc\u062f.  \u0627\u06af\u0631 \u06cc\u06a9 <code>EventEmitter<\/code> \u06cc\u06a9 \u0631\u0627 \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u062f <code>error<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u0627\u0645\u0627 \u0647\u06cc\u0686 \u0634\u0646\u0648\u0646\u062f\u0647 \u0627\u06cc \u0628\u0631\u0627\u06cc \u0622\u0646 \u0645\u0634\u062a\u0631\u06a9 \u0646\u0634\u062f\u0647 \u0627\u0633\u062a <code>error<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u060c \u0628\u0631\u0646\u0627\u0645\u0647 Node.js \u0631\u0627 \u067e\u0631\u062a\u0627\u0628 \u0645\u06cc \u06a9\u0646\u062f <code>Error<\/code> \u06a9\u0647 \u0645\u0646\u062a\u0634\u0631 \u0634\u062f.<\/p>\n<p>\u0627\u06cc\u0646 \u062f\u0631 \u0646\u0647\u0627\u06cc\u062a Node.js \u0631\u0627 \u0645\u062a\u0648\u0642\u0641 \u0645\u06cc \u06a9\u0646\u062f process \u0627\u0632 \u0627\u062c\u0631\u0627 \u0648 \u062e\u0631\u0648\u062c \u0627\u0632 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f\u060c \u062f\u0631 \u062d\u0627\u0644\u06cc \u06a9\u0647 stacktrace \u0628\u0631\u0627\u06cc \u062e\u0637\u0627 \u062f\u0631 \u0646\u0645\u0627\u06cc\u0634 \u062f\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f console.<\/p>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u0641\u0631\u0636 \u06a9\u0646\u06cc\u0645\u060c \u062f\u0631 \u0645\u0627 <code>CountDown<\/code> \u06a9\u0644\u0627\u0633\u060c <code>countdownTime<\/code> \u067e\u0627\u0631\u0627\u0645\u062a\u0631 \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u06a9\u0645\u062a\u0631 \u0627\u0632 2 \u0628\u0627\u0634\u062f \u0632\u06cc\u0631\u0627 \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u06a9\u0646\u06cc\u0645 <code>end-soon<\/code> \u062f\u0631 \u063a\u06cc\u0631 \u0627\u06cc\u0646 \u0635\u0648\u0631\u062a.<\/p>\n<p>\u062f\u0631 \u0686\u0646\u06cc\u0646 \u062d\u0627\u0644\u062a\u06cc\u060c \u06cc\u06a9 \u0631\u0627 \u0645\u0646\u062a\u0634\u0631 \u06a9\u0646\u06cc\u0645 <code>error<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">CountDown<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title\">EventEmitter<\/span> <\/span>{\n    <span class=\"hljs-function\"><span class=\"hljs-title\">constructor<\/span>(<span class=\"hljs-params\">countdownTime<\/span>)<\/span> {\n        <span class=\"hljs-built_in\">super<\/span>();\n\n        <span class=\"hljs-keyword\">if<\/span> (countdownTimer &lt; <span class=\"hljs-number\">2<\/span>) {\n            <span class=\"hljs-built_in\">this<\/span>.emit(<span class=\"hljs-string\">'error'<\/span>, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-built_in\">Error<\/span>(<span class=\"hljs-string\">'Value of the countdownTimer cannot be less than 2'<\/span>));\n        }\n\n        <span class=\"hljs-built_in\">this<\/span>.countdownTime = countdownTime;\n        <span class=\"hljs-built_in\">this<\/span>.currentTime = <span class=\"hljs-number\">0<\/span>;\n    }\n\n    <span class=\"hljs-comment\">\/\/ ...........<\/span>\n}\n<\/code><\/pre>\n<p>\u0645\u062f\u06cc\u0631\u06cc\u062a \u0627\u06cc\u0646 \u062e\u0637\u0627 \u0645\u0627\u0646\u0646\u062f \u0633\u0627\u06cc\u0631 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc \u0634\u0648\u062f:<\/p>\n<pre><code class=\"hljs\">myCountDown.\u0631\u0648\u06cc(<span class=\"hljs-string\">'error'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">err<\/span>) =&gt;<\/span> {\n    <span class=\"hljs-built_in\">console<\/span>.error(<span class=\"hljs-string\">'There was an error:'<\/span>, err);\n});\n<\/code><\/pre>\n<p>\u062f\u0627\u0634\u062a\u0646 \u06cc\u06a9 \u0634\u0646\u0648\u0646\u062f\u0647 \u0647\u0645\u06cc\u0634\u0647 \u062a\u0645\u0631\u06cc\u0646 \u062e\u0648\u0628\u06cc \u0627\u0633\u062a <code>error<\/code> \u0645\u0646\u0627\u0633\u0628\u062a \u0647\u0627.<\/p>\n<h2 id=\"nativemodulesusingeventemitter\"><span class=\"ez-toc-section\" id=\"%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87_%d8%a7%d8%b2_%d9%85%d8%a7%da%98%d9%88%d9%84_%d9%87%d8%a7%db%8c_%d8%a8%d9%88%d9%85%db%8c_event_emitter\"><\/span>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc \u0628\u0648\u0645\u06cc <em>Event Emitter<\/em><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc \u0628\u0648\u0645\u06cc \u062f\u0631 Node.js \u06af\u0633\u062a\u0631\u0634 \u0645\u06cc \u062f\u0647\u0646\u062f <code>EventEmitter<\/code> \u0637\u0628\u0642\u0647 \u0648 \u062f\u0631 \u0646\u062a\u06cc\u062c\u0647 \u062e\u0648\u062f \u0633\u0627\u0637\u0639 \u06a9\u0646\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0647\u0633\u062a\u0646\u062f.<\/p>\n<p>\u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0639\u0627\u0644\u06cc \u0627\u0633\u062a <code>Stream<\/code> \u06a9\u0644\u0627\u0633  \u062f\u0631 \u0627\u0633\u0646\u0627\u062f \u0631\u0633\u0645\u06cc \u0622\u0645\u062f\u0647 \u0627\u0633\u062a:<\/p>\n<blockquote>\n<p>\u062c\u0631\u06cc\u0627\u0646 \u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u062e\u0648\u0627\u0646\u0627\u060c \u0642\u0627\u0628\u0644 \u0646\u0648\u0634\u062a\u0646 \u06cc\u0627 \u0647\u0631 \u062f\u0648 \u0628\u0627\u0634\u0646\u062f.  \u0647\u0645\u0647 \u062c\u0631\u06cc\u0627\u0646 \u0647\u0627 \u0646\u0645\u0648\u0646\u0647 \u0647\u0627\u06cc\u06cc \u0627\u0632 <code>EventEmitter<\/code>.<\/p>\n<\/blockquote>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u0646\u06af\u0627\u0647\u06cc \u0628\u0647 \u0628\u0631\u062e\u06cc \u06a9\u0644\u0627\u0633\u06cc\u06a9 \u0628\u06cc\u0646\u062f\u0627\u0632\u06cc\u0645 <code>Stream<\/code> \u0627\u0633\u062a\u0641\u0627\u062f\u0647:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> fs = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'fs'<\/span>);\n<span class=\"hljs-keyword\">const<\/span> writer = fs.createWriteStream(<span class=\"hljs-string\">'example.txt'<\/span>);\n\n<span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-keyword\">let<\/span> i = <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-number\">100<\/span>; i++) {\n  writer.write(<span class=\"hljs-string\">`hello, #<span class=\"hljs-subst\">${i}<\/span>!\\n`<\/span>);\n}\n\nwriter.\u0631\u0648\u06cc(<span class=\"hljs-string\">'finish'<\/span>, <span class=\"hljs-function\">() =&gt;<\/span> {\n  <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'All writes are now complete.'<\/span>);\n});\n\nwriter.end(<span class=\"hljs-string\">'This is the end\\n'<\/span>);\n<\/code><\/pre>\n<p>\u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u0628\u06cc\u0646 \u0639\u0645\u0644\u06cc\u0627\u062a \u0646\u0648\u0634\u062a\u0646 \u0648 <code>writer.end()<\/code> \u062a\u0645\u0627\u0633 \u0628\u06af\u06cc\u0631\u06cc\u062f\u060c \u06cc\u06a9 \u0634\u0646\u0648\u0646\u062f\u0647 \u0627\u0636\u0627\u0641\u0647 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645. <code>Stream<\/code>s \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u06a9\u0646\u062f a <code>finished<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u067e\u0633 \u0627\u0632 \u0627\u062a\u0645\u0627\u0645  \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u062f\u06cc\u06af\u0631\u060c \u0645\u0627\u0646\u0646\u062f <code>error<\/code>\u060c <code>pipe<\/code> \u0648 <code>unpipe<\/code> \u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u06cc\u06a9 \u062e\u0637\u0627 \u0631\u062e \u0645\u06cc \u062f\u0647\u062f \u06cc\u0627 \u06cc\u06a9 \u062c\u0631\u06cc\u0627\u0646 \u062e\u0648\u0627\u0646\u062f\u0646 \u0628\u0647 \u06cc\u06a9 \u062c\u0631\u06cc\u0627\u0646 \u0646\u0648\u0634\u062a\u0646 \u0644\u0648\u0644\u0647 \u0645\u06cc \u0634\u0648\u062f \u06cc\u0627 \u0627\u0632 \u0622\u0646 \u062e\u0627\u0631\u062c \u0645\u06cc \u0634\u0648\u062f\u060c \u0645\u0646\u062a\u0634\u0631 \u0645\u06cc \u0634\u0648\u0646\u062f.<\/p>\n<p>\u06cc\u06a9\u06cc \u062f\u06cc\u06af\u0631 \u0627\u0632 \u06a9\u0644\u0627\u0633 \u0647\u0627\u06cc \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647 \u0627\u0633\u062a <code>child_process<\/code> \u06a9\u0644\u0627\u0633 \u0648 \u0622\u0646 <code>spawn()<\/code> \u0631\u0648\u0634:<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-keyword\">const<\/span> { spawn } = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'child_process'<\/span>);\n<span class=\"hljs-keyword\">const<\/span> ls = spawn(<span class=\"hljs-string\">'ls'<\/span>, (<span class=\"hljs-string\">'-lh'<\/span>, <span class=\"hljs-string\">'\/usr'<\/span>));\n\nls.stdout.\u0631\u0648\u06cc(<span class=\"hljs-string\">'data'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">data<\/span>) =&gt;<\/span> {\n  <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`stdout: <span class=\"hljs-subst\">${data}<\/span>`<\/span>);\n});\n\nls.stderr.\u0631\u0648\u06cc(<span class=\"hljs-string\">'data'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">data<\/span>) =&gt;<\/span> {\n  <span class=\"hljs-built_in\">console<\/span>.error(<span class=\"hljs-string\">`stderr: <span class=\"hljs-subst\">${data}<\/span>`<\/span>);\n});\n\nls.\u0631\u0648\u06cc(<span class=\"hljs-string\">'close'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">code<\/span>) =&gt;<\/span> {\n  <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`child process exited with code <span class=\"hljs-subst\">${code}<\/span>`<\/span>);\n});\n<\/code><\/pre>\n<p>\u0648\u0642\u062a\u06cc \u06a9\u0647 <code>child_process<\/code> \u062f\u0631 \u0644\u0648\u0644\u0647 \u062e\u0631\u0648\u062c\u06cc \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u0645\u06cc \u0646\u0648\u06cc\u0633\u062f <code>data<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u0632 <code>stdout<\/code> (\u06a9\u0647 \u0647\u0645\u0686\u0646\u06cc\u0646 <code>extends EventEmitter<\/code>) \u0634\u0644\u06cc\u06a9 \u062e\u0648\u0627\u0647\u062f \u06a9\u0631\u062f.  \u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u062c\u0631\u06cc\u0627\u0646 \u062e\u0631\u0648\u062c\u06cc \u0628\u0627 \u062e\u0637\u0627 \u0645\u0648\u0627\u062c\u0647 \u0645\u06cc \u0634\u0648\u062f\u060c <code>data<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u0632 <code>stderr<\/code> \u0644\u0648\u0644\u0647<\/p>\n<p>\u062f\u0631 \u0646\u0647\u0627\u06cc\u062a\u060c \u067e\u0633 \u0627\u0632 process \u062e\u0631\u0648\u062c\u06cc \u0647\u0627\u060c <code>close<\/code> \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u062e\u0631\u0627\u062c \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<h2 id=\"conclusion\"><span class=\"ez-toc-section\" id=\"%d9%86%d8%aa%db%8c%d8%ac%d9%87\"><\/span>\u0646\u062a\u06cc\u062c\u0647<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0645\u0639\u0645\u0627\u0631\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0645\u062d\u0648\u0631 \u0628\u0647 \u0645\u0627 \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0647\u0633\u062a\u0646\u062f <em>\u062c\u062f\u0627 \u0634\u062f\u0647<\/em> \u0648\u0644\u06cc <em>\u0628\u0633\u06cc\u0627\u0631 \u0645\u0646\u0633\u062c\u0645<\/em>.  \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0646\u062a\u06cc\u062c\u0647 \u06cc\u06a9 \u0639\u0645\u0644 \u0645\u0639\u06cc\u0646 \u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u0646\u062f \u0648 <code>1..n<\/code> \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0631\u0627\u06cc \u06af\u0648\u0634 \u062f\u0627\u062f\u0646 \u0648 \u0648\u0627\u06a9\u0646\u0634 \u0628\u0647 \u0622\u0646\u0647\u0627 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0631\u062f.<\/p>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647\u060c \u0645\u0627 \u0628\u0647 \u0627\u06cc\u0646 \u0645\u0648\u0636\u0648\u0639 \u067e\u0631\u062f\u0627\u062e\u062a\u06cc\u0645 <code>EventEmitter<\/code> \u06a9\u0644\u0627\u0633 \u0648 \u0639\u0645\u0644\u06a9\u0631\u062f \u0622\u0646  \u0645\u0627 \u0622\u0646 \u0631\u0627 \u0646\u0645\u0648\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u06a9\u0631\u062f\u0647\u200c\u0627\u06cc\u0645 \u0648 \u0645\u0633\u062a\u0642\u06cc\u0645\u0627\u064b \u0627\u0632 \u0622\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f\u0647\u200c\u0627\u06cc\u0645\u060c \u0648 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0631\u0641\u062a\u0627\u0631 \u0622\u0646 \u0631\u0627 \u0628\u0647 \u06cc\u06a9 \u0634\u06cc \u0633\u0641\u0627\u0631\u0634\u06cc \u06af\u0633\u062a\u0631\u0634 \u062f\u0627\u062f\u0647\u200c\u0627\u06cc\u0645.<\/p>\n<p>\u062f\u0631 \u0646\u0647\u0627\u06cc\u062a\u060c \u0628\u0631\u062e\u06cc \u0627\u0632 \u0639\u0645\u0644\u06a9\u0631\u062f\u0647\u0627\u06cc \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647 \u06a9\u0644\u0627\u0633 \u0631\u0627 \u067e\u0648\u0634\u0634 \u062f\u0627\u062f\u0647 \u0627\u06cc\u0645.<\/p>\n<p>\u0645\u062b\u0644 \u0647\u0645\u06cc\u0634\u0647 \u06a9\u062f \u0645\u0646\u0628\u0639 \u0645\u0648\u062c\u0648\u062f \u0627\u0633\u062a \u0631\u0648\u06cc <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/github.com\/jkasun\/sa-event-emitter\">GitHub<\/a>.<\/p>\n<\/div>\n<p>    (\u0628\u0631\u0686\u0633\u0628\u200c\u0647\u0627 \u0628\u0631\u0627\u06cc \u062a\u0631\u062c\u0645\u0647)# \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a<br \/>\n<br \/><br \/>\n<br \/>\u0645\u0646\u062a\u0634\u0631 \u0634\u062f\u0647 \u062f\u0631 1403-01-21 04:04:05<br \/>\n<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-center kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;center&quot;,&quot;id&quot;:&quot;16128&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0627\u0645\u062a\u06cc\u0627\u0632 \u0634\u0645\u0627 \u0628\u0647 \u0627\u06cc\u0646 \u0645\u0637\u0644\u0628&quot;,&quot;legend&quot;:&quot;0\\\/5 (0 \u0631\u0627\u06cc)&quot;,&quot;size&quot;:&quot;30&quot;,&quot;title&quot;:&quot;\u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 Node.js \u0628\u0627 EventEmitter \u062f\u0631 \u0627\u06cc\u0646 \u0622\u0645\u0648\u0632\u0634\u060c \u0645\u0627 \u0642\u0635\u062f \u062f\u0627\u0631\u06cc\u0645 \u0646\u06af\u0627\u0647\u06cc \u0628\u0647 \u06a9\u0644\u0627\u0633 EventEmitter \u0628\u0648\u0645\u06cc Node \u0628\u06cc\u0646\u062f\u0627\u0632\u06cc\u0645.  \u0634\u0645\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u060c \u06a9\u0627\u0631\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 EvenEmitter \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u062f \u0648 \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u06cc\u0627\u062f \u062e\u0648\u0627\u0647\u06cc\u062f \u06af\u0631\u0641\u062a.  \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc \u0628\u0648\u0645\u06cc \u062f\u06cc\u06af\u0631 \u0631\u0627 \u0627\u0632 \u06a9\u0644\u0627\u0633 EventEmitter \u0648 \u0686\u0646\u062f \u0646\u0645\u0648\u0646\u0647 \u062a\u0627...&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} ({count} \u0631\u0627\u06cc)&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-left: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 30px; height: 30px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 24px;\">\n            <span class=\"kksr-muted\">\u0627\u0645\u062a\u06cc\u0627\u0632 \u0634\u0645\u0627 \u0628\u0647 \u0627\u06cc\u0646 \u0645\u0637\u0644\u0628<\/span>\n    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">\u0632\u0645\u0627\u0646 \u0644\u0627\u0632\u0645 \u0628\u0631\u0627\u06cc \u0645\u0637\u0627\u0644\u0639\u0647: <\/span> <span class=\"rt-time\"> 9<\/span> <span class=\"rt-label rt-postfix\">\u062f\u0642\u06cc\u0642\u0647<\/span><\/span>\u0645\u0639\u0631\u0641\u06cc \u062f\u0631 \u0627\u06cc\u0646 \u0622\u0645\u0648\u0632\u0634 \u0642\u0635\u062f \u062f\u0627\u0631\u06cc\u0645 \u0646\u06af\u0627\u0647\u06cc \u0628\u0647 \u0628\u0648\u0645\u06cc Node \u0628\u06cc\u0627\u0646\u062f\u0627\u0632\u06cc\u0645 EventEmitter \u06a9\u0644\u0627\u0633 \u0634\u0645\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u060c \u0622\u0646\u0686\u0647 \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 \u0622\u0646 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u062f\u060c \u06cc\u0627\u062f \u062e\u0648\u0627\u0647\u06cc\u062f \u06af\u0631\u0641\u062a EvenEmitter\u0648 \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f. \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u0627\u0698\u0648\u0644\u200c\u0647\u0627\u06cc \u0628\u0648\u0645\u06cc \u062f\u06cc\u06af\u0631 \u0631\u0627 \u067e\u0648\u0634\u0634 \u062e\u0648\u0627\u0647\u06cc\u0645 \u062f\u0627\u062f EventEmitter \u06a9\u0644\u0627\u0633 \u0648 \u0686\u0646\u062f \u0645\u062b\u0627\u0644 \u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0622\u0646\u0686\u0647 \u062f\u0631 \u067e\u0634\u062a \u0635\u062d\u0646\u0647 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":16129,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1772,620],"tags":[],"class_list":["post-16128","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","category-programming"],"acf":[],"_links":{"self":[{"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/posts\/16128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/comments?post=16128"}],"version-history":[{"count":0,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/posts\/16128\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/media\/16129"}],"wp:attachment":[{"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/media?parent=16128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/categories?post=16128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/tags?post=16128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}