{"id":16533,"date":"2024-01-26T13:21:36","date_gmt":"2024-01-26T09:51:36","guid":{"rendered":"https:\/\/rasanegar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/"},"modified":"2024-01-26T13:21:36","modified_gmt":"2024-01-26T09:51:36","slug":"%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j","status":"publish","type":"post","link":"https:\/\/rasanegaar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/","title":{"rendered":"\u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0627\u06cc\u0645\u0631\u0647\u0627 \u0648 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 Node.jsNode.js \u062f\u0627\u0631\u0627\u06cc \u0686\u0646\u062f\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631 \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0632\u0645\u0627\u0646 \u0628\u0646\u062f\u06cc \u0627\u062c\u0631\u0627\u06cc \u06a9\u062f \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u06a9\u0645\u06a9\u06cc\u060c \u062a\u0631\u06a9\u06cc\u0628\u06cc\u060c \u0628\u0647 \u0634\u0645\u0627 \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f \u06a9\u0647 \u0628\u0647 \u0635\u0648\u0631\u062a \u0648\u0627\u06a9\u0646\u0634\u06cc \u062f\u0631 \u0632\u0645\u0627\u0646 \u0645\u0646\u0627\u0633\u0628 \u067e\u0627\u0633\u062e \u062f\u0647\u06cc\u062f\u060c \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644: \u067e\u0627\u06a9 \u06a9\u0631\u062f\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u062c\u0644\u0633\u0647 \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u062e\u0627\u0631\u062c \u0645\u06cc\u200c\u0634\u0648\u062f \u0632\u0645\u0627\u0646\u200c\u0628\u0646\u062f\u06cc \u0632\u0645\u0627\u0646\u200c\u0628\u0646\u062f\u06cc \u0628\u0631\u0627\u06cc \u062f\u0631\u06cc\u0627\u0641\u062a \u0646\u062a\u0627\u06cc\u062c \u0627\u0632 \u06cc\u06a9 \u062a\u0645\u0627\u0633 API&#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\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7_%d9%88_%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7_%d8%af%d8%b1_nodejs\" >\u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u062a\u0627\u06cc\u0645\u0631\u0647\u0627 \u062f\u0631 Node.js<\/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\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7\" >\u062a\u0627\u06cc\u0645\u0631\u0647\u0627<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/rasanegaar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#settimeout\" >setTimeout<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/rasanegaar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#setinterval\" >setInterval<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/rasanegaar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#%d8%aa%d9%86%d8%b8%db%8c%d9%85_%d9%81%d9%88%d8%b1%db%8c\" >\u062a\u0646\u0638\u06cc\u0645 \u0641\u0648\u0631\u06cc<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/rasanegaar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#%d8%ad%d9%84%d9%82%d9%87_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af\" >\u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/rasanegaar.com\/blog\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#%d9%be%d8%a7%d8%b3%d8%ae%da%af%d9%88%db%8c%db%8c_%d8%a8%d9%87_%d8%a8%d8%a7%d8%b2%da%af%d8%b4%d8%aa%e2%80%8c%d9%87%d8%a7%db%8c_%d9%86%d8%a7%d9%87%d9%85%d8%b2%d9%85%d8%a7%d9%86_%d8%a8%d8%a7_%d8%aa%d9%85%d8%a7%d8%b3%e2%80%8c%d9%87%d8%a7%db%8c_%d8%aa%d9%84%d9%81%d9%86%db%8c\" >\u067e\u0627\u0633\u062e\u06af\u0648\u06cc\u06cc \u0628\u0647 \u0628\u0627\u0632\u06af\u0634\u062a\u200c\u0647\u0627\u06cc \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0628\u0627 \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u062a\u0644\u0641\u0646\u06cc<\/a><\/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\/%d8%b1%d9%88%d8%b4-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7-%d9%88-%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7-%d8%af%d8%b1-node-jsnode-j\/#%d9%be%d8%a7%d8%b3%d8%ae%da%af%d9%88%db%8c%db%8c_%d8%a8%d9%87_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7_%d8%a8%d8%a7_%d8%b4%d9%86%d9%88%d9%86%d8%af%da%af%d8%a7%d9%86_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af\" >\u067e\u0627\u0633\u062e\u06af\u0648\u06cc\u06cc \u0628\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0628\u0627 \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f<\/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=\"eventsandtimersinnodejs\"><span class=\"ez-toc-section\" id=\"%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7_%d9%88_%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7_%d8%af%d8%b1_nodejs\"><\/span>\u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u062a\u0627\u06cc\u0645\u0631\u0647\u0627 \u062f\u0631 Node.js<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Node.js \u062f\u0627\u0631\u0627\u06cc \u0686\u0646\u062f\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631 \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0632\u0645\u0627\u0646 \u0628\u0646\u062f\u06cc \u0627\u062c\u0631\u0627\u06cc \u06a9\u062f \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u06a9\u0645\u06a9\u06cc\u060c \u062a\u0631\u06a9\u06cc\u0628\u06cc\u060c \u0628\u0647 \u0634\u0645\u0627 \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0645\u06cc \u062f\u0647\u0646\u062f \u06a9\u0647 \u0628\u0647 \u0637\u0648\u0631 \u0648\u0627\u06a9\u0646\u0634\u06cc \u062f\u0631 \u0632\u0645\u0627\u0646 \u0645\u0646\u0627\u0633\u0628 \u067e\u0627\u0633\u062e \u062f\u0647\u06cc\u062f\u060c \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644:<\/p>\n<ul>\n<li>\u067e\u0627\u06a9 \u06a9\u0631\u062f\u0646 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062c\u0644\u0633\u0647 \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u062e\u0627\u0631\u062c \u0645\u06cc \u0634\u0648\u062f<\/li>\n<li>\u0632\u0645\u0627\u0646\u200c\u0628\u0646\u062f\u06cc \u0632\u0645\u0627\u0646\u200c\u0628\u0646\u062f\u06cc \u0628\u0631\u0627\u06cc \u062f\u0631\u06cc\u0627\u0641\u062a \u0646\u062a\u0627\u06cc\u062c \u0627\u0632 \u062a\u0645\u0627\u0633 API \u0648 \u062a\u0639\u06cc\u06cc\u0646 \u06a9\u062f \u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u062e\u0637\u0627 \u0628\u0631\u0627\u06cc \u0627\u062c\u0631\u0627 \u062f\u0631 \u0635\u0648\u0631\u062a \u0648\u0642\u0641\u0647<\/li>\n<li>\u0628\u0633\u062a\u0646 \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0642\u0628\u0644 \u0627\u0632 \u062e\u0631\u0648\u062c \u0627\u0632 Node.js<\/li>\n<\/ul>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u0628\u0647 \u0631\u0648\u0634 \u0627\u0646\u062c\u0627\u0645 \u0622\u0646 \u0645\u06cc \u067e\u0631\u062f\u0627\u0632\u06cc\u0645 <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/nodejs.org\/en\/docs\/guides\/timers-in-node\/\" class=\"broken_link\">\u062a\u0627\u06cc\u0645\u0631\u0647\u0627<\/a> \u062f\u0631 Node.js \u06a9\u0627\u0631 \u06a9\u0646\u06cc\u062f.  \u0647\u0645\u0686\u0646\u06cc\u0646 \u0631\u0648\u0634 \u0639\u0645\u0644\u06a9\u0631\u062f \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f Node.js \u0648 \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0642\u0627\u0628\u0644\u06cc\u062a\u200c\u0647\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f Node \u0631\u0627 \u0645\u0639\u0631\u0641\u06cc \u062e\u0648\u0627\u0647\u06cc\u0645 \u06a9\u0631\u062f.<\/p>\n<h2 id=\"timers\"><span class=\"ez-toc-section\" id=\"%d8%aa%d8%a7%db%8c%d9%85%d8%b1%d9%87%d8%a7\"><\/span>\u062a\u0627\u06cc\u0645\u0631\u0647\u0627<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u0648\u0644\u06cc\u0646 \u0645\u062c\u0645\u0648\u0639\u0647 \u0627\u0632 \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0628\u0647 \u0622\u0646\u0647\u0627 \u0646\u06af\u0627\u0647 \u062e\u0648\u0627\u0647\u06cc\u0645 \u06a9\u0631\u062f \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632 <code>setTimeout<\/code>\u060c <code>setImmediate<\/code>\u060c \u0648 <code>setInterval<\/code> \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u0632\u0645\u0627\u0646 \u0628\u0646\u062f\u06cc  \u0628\u0627 \u0627\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631\u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627\u06cc \u06a9\u062f \u0631\u0627 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u06cc\u0645.<\/p>\n<p>\u0686\u0631\u0627 \u0627\u06cc\u0646 \u0645\u0647\u0645 \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f\u061f  \u062f\u0631 Node.js\u060c \u0645\u0634\u0627\u0628\u0647 \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u0627\u0632 \u0632\u0628\u0627\u0646 \u0647\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u062f\u06cc\u06af\u0631 \u0645\u0627\u0646\u0646\u062f C\u060c Python\u060c Java \u0648 \u062f\u06cc\u06af\u0631\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u06cc\u062f\u060c \u0628\u0647 \u0628\u0631\u0646\u0627\u0645\u0647 \u0631\u06cc\u0632\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f\u0647\u0627\u06cc \u062e\u0627\u0635 \u0628\u0631\u0627\u06cc \u0627\u062c\u0631\u0627\u06cc \u0645\u06a9\u0631\u0631 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p>\u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644\u060c \u0641\u0631\u0636 \u06a9\u0646\u06cc\u062f \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u0641\u0627\u06cc\u0644\u200c\u0647\u0627\u06cc \u062e\u0627\u0635\u06cc \u0631\u0627 \u0627\u0632 \u06cc\u06a9 \u0645\u06a9\u0627\u0646 \u062f\u0631\u06cc\u0627\u0641\u062a \u06a9\u0646\u0646\u062f\u0647 \u0628\u0647 \u06cc\u06a9 \u0622\u0631\u0634\u06cc\u0648 \u062f\u0627\u0626\u0645\u06cc \u06a9\u067e\u06cc \u06a9\u0646\u06cc\u0645.  \u0627\u06cc\u0646 \u06cc\u06a9 \u0633\u0646\u0627\u0631\u06cc\u0648\u06cc \u062e\u0648\u0628 \u0628\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0631\u06cc\u0632\u06cc \u0627\u0646\u062a\u0642\u0627\u0644 \u0641\u0627\u06cc\u0644 \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f.  \u062f\u0631 \u0641\u0648\u0627\u0635\u0644 \u0632\u0645\u0627\u0646\u06cc \u0645\u0639\u06cc\u0646\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u0645 \u0641\u0627\u06cc\u0644\u200c\u0647\u0627\u06cc \u062c\u062f\u06cc\u062f \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0631\u062f\u0647 \u0648 \u0633\u067e\u0633 \u0622\u0646\u200c\u0647\u0627 \u0631\u0627 \u062f\u0631 \u0641\u0627\u06cc\u0644 \u06a9\u067e\u06cc \u06a9\u0646\u06cc\u0645 backup \u0645\u06a9\u0627\u0646 \u062f\u0631 \u0635\u0648\u0631\u062a \u0648\u062c\u0648\u062f<\/p>\n<h3 id=\"settimeout\"><span class=\"ez-toc-section\" id=\"settimeout\"><\/span>setTimeout<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0628\u0627 <code>setTimeout<\/code>\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u0645 \u06a9\u062f\u0647\u0627 \u0631\u0627 \u0628\u0631\u0646\u0627\u0645\u0647\u200c\u0631\u06cc\u0632\u06cc \u06a9\u0646\u06cc\u0645 \u062a\u0627 \u067e\u0633 \u0627\u0632 \u06af\u0630\u0634\u062a \u0645\u062f\u062a \u0632\u0645\u0627\u0646 \u0645\u0634\u062e\u0635\u06cc \u0627\u062c\u0631\u0627 \u0634\u0648\u0646\u062f.<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-comment\">\/\/ setTimeout.js<\/span>\n\n<span class=\"hljs-keyword\">let<\/span> cue = <span class=\"hljs-string\">'The actors are here!'<\/span>;\n\n<span class=\"hljs-comment\">\/\/ However, the cue is not announced until at least 5000ms have<\/span>\n<span class=\"hljs-comment\">\/\/ passed through the use of setTimeout<\/span>\n<span class=\"hljs-built_in\">setTimeout<\/span>(<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\"><\/span>) <\/span>{\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">console<\/span>.log(cue);\n}, <span class=\"hljs-number\">5000<\/span>);\n\n<span class=\"hljs-comment\">\/\/ This console log is executed right away<\/span>\n<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'An exploration of art and music. And now, as we wait for the actors...'<\/span>);\n<\/code><\/pre>\n<p>\u0628\u0631\u0627\u06cc \u0627\u062c\u0631\u0627\u06cc \u0627\u06cc\u0646 \u06a9\u062f \u0648 \u0645\u0634\u0627\u0647\u062f\u0647 \u0622\u0646 \u062f\u0631 \u0639\u0645\u0644\u060c \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f <code>node setTimeout.js<\/code> \u062f\u0631 \u0634\u0645\u0627 terminal:<\/p>\n<pre><code class=\"hljs\">$ node setTimeout.js\nAn exploration of art and music. And now, as we <span class=\"hljs-built_in\">wait<\/span> <span class=\"hljs-keyword\">for<\/span> the actors...\nThe actors are here!\n<\/code><\/pre>\n<p>\u062a\u0648\u062c\u0647 \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u062d\u062a\u06cc \u0627\u06af\u0631 <code>console('An exploration...')<\/code> \u062a\u0645\u0627\u0633 \u0627\u0633\u062a <em>\u0628\u0639\u062f \u0627\u0632<\/em> \u0645\u0627 <code>console.log(cue)<\/code> \u062a\u0645\u0627\u0633 \u0628\u06af\u06cc\u0631\u06cc\u062f\u060c \u0647\u0646\u0648\u0632 \u0647\u0645 \u0627\u0648\u0644 \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<p>\u062a\u0631\u0641\u0646\u062f\u06cc \u06a9\u0647 \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0628\u0627\u06cc\u062f \u0641\u0647\u0645\u06cc\u062f \u0627\u06cc\u0646 \u0627\u0633\u062a \u06a9\u0647 \u0627\u062c\u0631\u0627\u06cc \u06a9\u062f \u0641\u0642\u0637 \u067e\u0633 \u0627\u0632 \u06af\u0630\u0634\u062a \u062d\u062f\u0627\u0642\u0644 \u0622\u0646 \u0645\u062f\u062a \u0632\u0645\u0627\u0646 \u062a\u0636\u0645\u06cc\u0646 \u0634\u062f\u0647 \u0627\u0633\u062a\u060c \u062f\u0631\u0633\u062a \u0646\u06cc\u0633\u062a. \u0631\u0648\u06cc \u0646\u0642\u0637\u0647.<\/p>\n<h3 id=\"setinterval\"><span class=\"ez-toc-section\" id=\"setinterval\"><\/span>setInterval<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u062f\u0631 \u0634\u0631\u0627\u06cc\u0637\u06cc \u06a9\u0647 \u0628\u0647 \u0627\u062c\u0631\u0627\u06cc \u06a9\u062f\u0647\u0627\u06cc \u0645\u06a9\u0631\u0631 \u0648 \u0645\u0646\u0638\u0645 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u062f\u060c \u0645\u0627\u0646\u0646\u062f \u0646\u0638\u0631\u0633\u0646\u062c\u06cc \u0637\u0648\u0644\u0627\u0646\u06cc\u060c \u0633\u067e\u0633 <code>setInterval<\/code> \u0631\u0648\u0634 \u0645\u0646\u0627\u0633\u0628 \u062a\u0631\u06cc \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f <code>setTimeout<\/code>.  \u0628\u0627 \u0627\u06cc\u0646 \u062a\u0627\u0628\u0639 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u06cc\u06a9 \u062a\u0627\u0628\u0639 \u0631\u0627 \u0645\u0634\u062e\u0635 \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0647\u0631 X \u062b\u0627\u0646\u06cc\u0647 \u0627\u062c\u0631\u0627 \u0634\u0648\u062f.  \u062a\u0627\u0628\u0639 \u062f\u0631 \u0648\u0627\u0642\u0639 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u062e\u0648\u062f \u0631\u0627 \u062f\u0631 \u0645\u06cc\u0644\u06cc \u062b\u0627\u0646\u06cc\u0647 \u0645\u06cc \u06af\u06cc\u0631\u062f\u060c \u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 \u0634\u0645\u0627 \u0628\u0627\u06cc\u062f \u0642\u0628\u0644 \u0627\u0632 \u0648\u0627\u0631\u062f \u06a9\u0631\u062f\u0646 \u0622\u0631\u06af\u0648\u0645\u0627\u0646 \u0647\u0627\u06cc \u062e\u0648\u062f\u060c \u062a\u0628\u062f\u06cc\u0644 \u0631\u0627 \u062e\u0648\u062f\u062a\u0627\u0646 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u062f.<\/p>\n<p>\u0641\u0631\u0636 \u06a9\u0646\u06cc\u062f \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u0637\u0648\u0644 \u0635\u0641 \u0631\u0627 \u062f\u0631 \u0645\u06a9\u200c\u062f\u0648\u0646\u0627\u0644\u062f\u0632 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u0645 \u062a\u0627 \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0628\u0631\u0646\u0627\u0645\u0647 \u0645\u0627 \u0628\u062a\u0648\u0627\u0646\u0646\u062f \u062f\u0631 \u0628\u0647\u062a\u0631\u06cc\u0646 \u0632\u0645\u0627\u0646 \u0627\u0632 \u0622\u0646 \u062e\u0627\u0631\u062c \u0634\u0648\u0646\u062f.  \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f\u0646 <code>setInterval<\/code>\u060c \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0628\u0627\u0631\u0647\u0627 \u0637\u0648\u0644 \u0635\u0641 \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u0645 \u0648 \u0628\u0647 \u0622\u0646\u0647\u0627 \u0628\u06af\u0648\u06cc\u06cc\u0645 \u06a9\u0647 \u0633\u0627\u062d\u0644 \u0635\u0627\u0641 \u0627\u0633\u062a.<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-comment\">\/\/ setInterval.js<\/span>\n\n<span class=\"hljs-comment\">\/\/ This function simulates us checking the length<\/span>\n<span class=\"hljs-comment\">\/\/ of a McDonald's drive-through queue<\/span>\n<span class=\"hljs-keyword\">let<\/span> getQueueLength = <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\"><\/span>) <\/span>{\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">Math<\/span>.round(<span class=\"hljs-number\">12<\/span> * <span class=\"hljs-built_in\">Math<\/span>.random());\n};\n\n<span class=\"hljs-comment\">\/\/ We would like to retrieve the queue length at regular intervals<\/span>\n<span class=\"hljs-comment\">\/\/ this way, we can decide when to make a quick dash over<\/span>\n<span class=\"hljs-comment\">\/\/ at the optimal time<\/span>\n<span class=\"hljs-built_in\">setInterval<\/span>(<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\"><\/span>) <\/span>{\n    <span class=\"hljs-keyword\">let<\/span> queueLength = getQueueLength();\n\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">`The queue at the McDonald's drive-through is now <span class=\"hljs-subst\">${queueLength}<\/span> cars long.`<\/span>);\n\n    <span class=\"hljs-keyword\">if<\/span> (queueLength === <span class=\"hljs-number\">0<\/span>) {\n        <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Quick, grab your coat!'<\/span>);\n    }\n\n    <span class=\"hljs-keyword\">if<\/span> (queueLength &gt; <span class=\"hljs-number\">8<\/span>) {\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'This is beginning to look impossible!'<\/span>);\n    }\n}, <span class=\"hljs-number\">3000<\/span>);\n<\/code><\/pre>\n<p>\u062f\u0631 \u0632\u06cc\u0631 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u062e\u0631\u0648\u062c\u06cc \u0631\u0627 \u0645\u0634\u0627\u0647\u062f\u0647 \u06a9\u0646\u06cc\u062f.  \u06a9\u062f \u0631\u0627 \u0628\u0627 <code>node setInterval.js<\/code>\u060c \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u062f\u0631 \u0632\u06cc\u0631 \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a:.<\/p>\n<pre><code class=\"hljs\">$ node setTimeout.js \nThe queue at the McDonald<span class=\"hljs-string\">'s drive-through is now 6 cars long.\nThe queue at the McDonald'<\/span>s drive-through is now 0 cars long.\nQuick, grab your coat!\nThe queue at the McDonald<span class=\"hljs-string\">'s drive-through is now 1 cars long.\nThe queue at the McDonald'<\/span>s drive-through is now 3 cars long.\nThe queue at the McDonald<span class=\"hljs-string\">'s drive-through is now 9 cars long.\nThis is beginning to look impossible!\nThe queue at the McDonald'<\/span>s drive-through is now 0 cars long.\nQuick, grab your coat!\nThe queue at the McDonald<span class=\"hljs-string\">'s drive-through is now 10 cars long.\nThis is beginning to look impossible!\n<\/span><\/code><\/pre>\n<h3 id=\"setimmediate\"><span class=\"ez-toc-section\" id=\"%d8%aa%d9%86%d8%b8%db%8c%d9%85_%d9%81%d9%88%d8%b1%db%8c\"><\/span>\u062a\u0646\u0638\u06cc\u0645 \u0641\u0648\u0631\u06cc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0627\u06af\u0631 \u0628\u062e\u0648\u0627\u0647\u06cc\u0645 \u06cc\u06a9 \u062a\u0627\u0628\u0639 \u062a\u0627 \u062d\u062f \u0627\u0645\u06a9\u0627\u0646 \u0641\u0648\u0631\u06cc \u0627\u062c\u0631\u0627 \u0634\u0648\u062f\u060c \u0627\u0632 \u0622\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u06cc\u0645 <code>setImmediate<\/code>.  \u062a\u0627\u0628\u0639\u06cc \u06a9\u0647 \u0628\u0647 \u0627\u06cc\u0646 \u062a\u0631\u062a\u06cc\u0628 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u06cc\u0645\u060c \u062c\u0644\u0648\u062a\u0631 \u0627\u0632 \u0647\u0645\u0647 \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f <code>setTimeout<\/code> \u06cc\u0627 <code>setInterval<\/code> \u0628\u0647 \u0645\u062d\u0636 \u0627\u06cc\u0646\u06a9\u0647 \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0641\u0639\u0644\u06cc Node.js \u0641\u0631\u0627\u062e\u0648\u0627\u0646\u06cc \u062a\u0645\u0627\u0633 \u0647\u0627\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u062a\u0645\u0627\u0645 \u06a9\u0631\u062f\u060c \u062a\u0645\u0627\u0633 \u0645\u06cc \u06af\u06cc\u0631\u062f.<\/p>\n<p>\u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0646\u0645\u0648\u0646\u0647 \u0627\u0632 \u0627\u06cc\u0646 \u062f\u0631 \u0627\u0633\u062a process.  \u0628\u0627 \u062f\u0633\u062a\u0648\u0631 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0627\u06cc\u0646 \u06a9\u062f \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f <code>node setImmediate.js<\/code><\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-comment\">\/\/ setImmediate.js<\/span>\n\n<span class=\"hljs-comment\">\/\/ A timeout<\/span>\n<span class=\"hljs-built_in\">setTimeout<\/span>(<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\"><\/span>) <\/span>{\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'I am a timeout'<\/span>);\n}, <span class=\"hljs-number\">5000<\/span>);\n\n<span class=\"hljs-comment\">\/\/ An interval<\/span>\n<span class=\"hljs-built_in\">setInterval<\/span>(<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\"><\/span>) <\/span>{\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'I am an interval'<\/span>);\n}, <span class=\"hljs-number\">5000<\/span>);\n\n<span class=\"hljs-comment\">\/\/ An immediate, its callback will be executed before those defined above<\/span>\nsetImmediate(<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\"><\/span>) <\/span>{\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'I am an immediate'<\/span>);\n});\n\n<span class=\"hljs-comment\">\/\/ IO callbacks and code in the normal event loop runs before the timers<\/span>\n<span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'I am a normal statement in the event loop, guess what comes next?'<\/span>);\n<\/code><\/pre>\n<pre><code class=\"hljs\">$ node setImmediate.js \nI am a normal statement <span class=\"hljs-keyword\">in<\/span> the event loop, guess what comes next?\nI am an immediate\nI am a timeout\nI am an interval\nI am an interval\nI am an interval\n...\n<\/code><\/pre>\n<p>\u0627\u06cc\u0646 <code>setImmediate<\/code> \u067e\u0627\u0633\u062e \u062a\u0645\u0627\u0633\u060c \u0647\u0631 \u0686\u0646\u062f \u062a\u0639\u0631\u06cc\u0641 \u0634\u062f\u0647 \u0627\u0633\u062a <em>\u0628\u0639\u062f \u0627\u0632<\/em> \u06a9\u0633\u0627\u0646\u06cc \u06a9\u0647 \u0628\u0631\u0627\u06cc <code>setInterval<\/code> \u0648 <code>setTimeout<\/code>\u060c \u062c\u0644\u0648\u062a\u0631 \u0627\u0632 \u0622\u0646\u0647\u0627 \u062e\u0648\u0627\u0647\u062f \u062f\u0648\u06cc\u062f.<\/p>\n<h2 id=\"theeventloop\"><span class=\"ez-toc-section\" id=\"%d8%ad%d9%84%d9%82%d9%87_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af\"><\/span>\u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0633\u0648\u0627\u0644\u06cc \u06a9\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0631\u0627\u06cc \u0634\u0645\u0627 \u067e\u06cc\u0634 \u0622\u0645\u062f\u0647 \u0628\u0627\u0634\u062f \u0627\u06cc\u0646 \u0627\u0633\u062a \u06a9\u0647 &#8220;Node.js \u0686\u06af\u0648\u0646\u0647 \u062a\u0645\u0627\u0645 \u0627\u06cc\u0646 \u0632\u0645\u0627\u0646 \u0647\u0627\u060c \u062a\u0627\u06cc\u0645\u0631\u0647\u0627 \u0648 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0631\u0627 \u067e\u06cc\u06af\u06cc\u0631\u06cc \u0645\u06cc \u06a9\u0646\u062f\u061f \u062a\u0631\u062a\u06cc\u0628 \u0627\u062c\u0631\u0627 \u0686\u06af\u0648\u0646\u0647 \u0627\u0648\u0644\u0648\u06cc\u062a \u0628\u0646\u062f\u06cc \u0645\u06cc \u0634\u0648\u062f\u061f&#8221;  \u0627\u06cc\u0646 \u06cc\u06a9 \u062e\u0637 \u062a\u062d\u0642\u06cc\u0642 \u062e\u0648\u0628 \u0627\u0633\u062a \u0648 \u0646\u06cc\u0627\u0632 \u0628\u0647 \u0628\u0631\u0631\u0633\u06cc \u0686\u06cc\u0632\u06cc \u0628\u0647 \u0646\u0627\u0645 &#8220;\u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f Node.js&#8221; \u062f\u0627\u0631\u062f.<\/p>\n<p>\u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646\u060c \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0686\u06cc\u0633\u062a\u061f<\/p>\n<p>\u0627\u06cc\u0646 <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/nodejs.org\/en\/docs\/guides\/event-loop-timers-and-nexttick\/\" class=\"broken_link\">\u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f<\/a> \u0628\u0647 \u0633\u0627\u062f\u06af\u06cc \u06cc\u06a9 \u0686\u0631\u062e\u0647 \u062a\u06a9\u0631\u0627\u0631\u06cc \u0627\u0633\u062a \u06a9\u0647 Node.js \u0627\u0632 \u0637\u0631\u06cc\u0642 \u067e\u0631\u062f\u0627\u0632\u0634 \u0645\u062d\u0627\u0633\u0628\u0627\u062a \u0633\u0648\u0626\u06cc\u0686 \u0645\u06cc \u06a9\u0646\u062f.  \u0627\u0632 \u0622\u0646\u062c\u0627\u06cc\u06cc \u06a9\u0647 \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0647\u0645\u0647 \u0645\u062d\u0627\u0633\u0628\u0627\u062a \u0645\u0645\u06a9\u0646 \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u0647\u0645\u0632\u0645\u0627\u0646 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u062f\u060c \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u062a\u06a9 \u0631\u0634\u062a\u0647 \u0627\u06cc\u060c \u0627\u0632 \u0645\u062d\u0627\u0633\u0628\u0627\u062a \u0628\u0647 \u0645\u062d\u0627\u0633\u0628\u0627\u062a \u062f\u0631 \u06cc\u06a9 \u062d\u0644\u0642\u0647 \u06a9\u0627\u0645\u0644\u0627\u064b \u062a\u0639\u0631\u06cc\u0641 \u0634\u062f\u0647 \u0628\u0647 \u0646\u0627\u0645 \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u062a\u063a\u06cc\u06cc\u0631 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p>\u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u062f\u0627\u0631\u0627\u06cc \u0645\u0631\u0627\u062d\u0644 \u0627\u0633\u0627\u0633\u06cc \u0632\u06cc\u0631 \u0627\u0633\u062a:<\/p>\n<ul>\n<li>\u062a\u0627\u06cc\u0645\u0631 &#8211; \u0641\u0631\u0627\u062e\u0648\u0627\u0646 \u0647\u0627\u06cc\u06cc \u0631\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u0628\u0627 \u0622\u0646\u0647\u0627 \u0628\u0631\u0646\u0627\u0645\u0647 \u0631\u06cc\u0632\u06cc \u0634\u062f\u0647 \u0627\u0646\u062f <code>setTimeout<\/code> \u0648 <code>setInterval<\/code><\/li>\n<li>\u067e\u0627\u0633\u062e \u0628\u0647 \u062a\u0645\u0627\u0633 \u0647\u0627\u06cc \u0645\u0639\u0644\u0642 &#8211; \u0647\u0631 \u062a\u0645\u0627\u0633\u06cc \u0631\u0627 \u06a9\u0647 \u0622\u0645\u0627\u062f\u0647 \u0627\u062c\u0631\u0627 \u0647\u0633\u062a\u0646\u062f \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u062f<\/li>\n<li>\u0628\u06cc\u06a9\u0627\u0631\u060c \u0622\u0645\u0627\u062f\u0647 &#8211; \u062f\u0627\u062e\u0644\u06cc Node.js<\/li>\n<li>\u0646\u0638\u0631\u0633\u0646\u062c\u06cc &#8211; \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u0648\u0631\u0648\u062f\u06cc \u0648 \u067e\u0631\u062f\u0627\u0632\u0634 \u062f\u0627\u062f\u0647 \u0631\u0627 \u0645\u06cc \u067e\u0630\u06cc\u0631\u062f<\/li>\n<li>\u0628\u0631\u0631\u0633\u06cc &#8211; \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0646\u0638\u06cc\u0645 \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0631\u06af\u0634\u062a\u06cc \u0631\u0627 \u0641\u0631\u0627\u062e\u0648\u0627\u0646\u06cc \u0645\u06cc\u200c\u06a9\u0646\u062f <code>setImmediate<\/code><\/li>\n<li>\u0628\u0633\u062a\u0646 \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0631\u06af\u0634\u062a\u06cc &#8211; \u0628\u0631\u0627\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u0646\u0632\u062f\u06cc\u06a9\u060c \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0631\u06af\u0634\u062a\u06cc \u0631\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc\u200c\u06a9\u0646\u062f<\/li>\n<\/ul>\n<p>Event Loop \u0633\u062a\u0648\u0646 \u0641\u0642\u0631\u0627\u062a \u06a9\u0627\u0631 \u0628\u0627 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u0633\u0627\u06cc\u0631 \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u062f\u0631 Node.js \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0628\u0647 \u0645\u0627 \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0642\u0644\u0627\u0628 \u0647\u0627\u06cc\u06cc \u0631\u0627 \u062f\u0631 \u0646\u0642\u0627\u0637 \u062e\u0627\u0635\u06cc \u0642\u0631\u0627\u0631 \u062f\u0647\u06cc\u0645 \u06a9\u0647 \u062f\u0631 \u0637\u0648\u0644 \u062d\u0644\u0642\u0647 \u0636\u0631\u0628\u0647 \u0645\u06cc \u0632\u0646\u0646\u062f.<\/p>\n<h2 id=\"respondingtoasynchronousreturnswithcallbacks\"><span class=\"ez-toc-section\" id=\"%d9%be%d8%a7%d8%b3%d8%ae%da%af%d9%88%db%8c%db%8c_%d8%a8%d9%87_%d8%a8%d8%a7%d8%b2%da%af%d8%b4%d8%aa%e2%80%8c%d9%87%d8%a7%db%8c_%d9%86%d8%a7%d9%87%d9%85%d8%b2%d9%85%d8%a7%d9%86_%d8%a8%d8%a7_%d8%aa%d9%85%d8%a7%d8%b3%e2%80%8c%d9%87%d8%a7%db%8c_%d8%aa%d9%84%d9%81%d9%86%db%8c\"><\/span>\u067e\u0627\u0633\u062e\u06af\u0648\u06cc\u06cc \u0628\u0647 \u0628\u0627\u0632\u06af\u0634\u062a\u200c\u0647\u0627\u06cc \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0628\u0627 \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u062a\u0644\u0641\u0646\u06cc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0627 \u062a\u0648\u062c\u0647 \u0628\u0647 \u0645\u0627\u0647\u06cc\u062a \u062a\u06a9 \u0631\u0634\u062a\u0647 \u0627\u06cc Node.js\u060c \u0639\u0645\u0644\u06cc\u0627\u062a \u0637\u0648\u0644\u0627\u0646\u06cc \u0645\u062f\u062a \u0645\u0627\u0646\u0646\u062f \u062e\u0648\u0627\u0646\u062f\u0646 \u0641\u0627\u06cc\u0644 \u06cc\u0627 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0647 \u0633\u0631\u0639\u062a \u062f\u0631 \u0633\u06cc\u0633\u062a\u0645 \u0639\u0627\u0645\u0644 \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u0645\u06cc \u0634\u0648\u0646\u062f\u060c \u0633\u067e\u0633 Node.js \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u062e\u0648\u062f \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u0645\u0639\u0645\u0648\u0644 \u0627\u062f\u0627\u0645\u0647 \u0645\u06cc \u062f\u0647\u062f.  \u0627\u06cc\u0646 \u06a9\u0627\u0631\u0647\u0627 \u0631\u0627 \u06a9\u0627\u0631\u0622\u0645\u062f \u0648 \u0633\u0631\u06cc\u0639 \u0646\u06af\u0647 \u0645\u06cc \u062f\u0627\u0631\u062f.<\/p>\n<p>\u0627\u06cc\u0646 \u0641\u0631\u0622\u06cc\u0646\u062f\u0647\u0627\u06cc \u0633\u06cc\u0633\u062a\u0645 \u0639\u0627\u0645\u0644 \u0686\u06af\u0648\u0646\u0647 \u0628\u0627 Node.js \u062a\u0639\u0627\u0645\u0644 \u062f\u0627\u0631\u0646\u062f process?  \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0627\u0628\u0632\u0627\u0631 \u0628\u0631\u06af\u0634\u062a \u062a\u0645\u0627\u0633.  \u0645\u0627 \u0627\u0632 \u06cc\u06a9 callback \u0628\u0631\u0627\u06cc \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u06cc\u0645 process \u0686\u06cc\u0632\u0647\u0627\u06cc\u06cc \u062f\u0631 \u067e\u0633 \u0632\u0645\u06cc\u0646\u0647\u060c \u067e\u0633 hook \u067e\u0633 \u0627\u0632 \u0627\u062a\u0645\u0627\u0645 \u06a9\u0627\u0631 \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0628\u0647 \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0628\u0627\u0632\u06af\u0631\u062f\u06cc\u062f.  \u0628\u0631\u0627\u06cc \u062f\u0631\u06cc\u0627\u0641\u062a \u0627\u06cc\u0646 \u0646\u0648\u0639 \u0639\u0645\u0644\u06a9\u0631\u062f \u062f\u0631 \u0633\u0627\u06cc\u0631 \u0632\u0628\u0627\u0646 \u0647\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc\u060c \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0627\u0632 \u06cc\u06a9 \u0635\u0641 \u06a9\u0627\u0631 \u0645\u0627\u0646\u0646\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.celeryproject.org\/\">\u06a9\u0631\u0641\u0633<\/a> \u062f\u0631 \u067e\u0627\u06cc\u062a\u0648\u0646 \u06cc\u0627 <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/sidekiq.org\/\">\u0633\u06cc\u062f\u06cc\u06a9<\/a> \u06a9\u0647 \u062f\u0631 Ruby.  \u062f\u0631 Node.js\u060c \u0627\u0632 \u0622\u0646\u062c\u0627 \u06a9\u0647 \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0648 \u0627\u062c\u0631\u0627\u06cc \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 Node.js \u0642\u0628\u0644\u0627\u064b \u0645\u0648\u0627\u0631\u062f \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u062e\u0648\u062f\u06a9\u0627\u0631 \u0628\u0631\u0627\u06cc \u0634\u0645\u0627 \u062f\u0631 \u0635\u0641 \u0642\u0631\u0627\u0631 \u0645\u06cc \u062f\u0647\u0646\u062f\u060c \u0634\u0645\u0627 \u0627\u06cc\u0646 \u067e\u0631\u062f\u0627\u0632\u0634 \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u0631\u0627\u06cc\u06af\u0627\u0646 \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u06cc \u06a9\u0646\u06cc\u062f.<\/p>\n<p>\u0628\u0631\u0627\u06cc \u062f\u06cc\u062f\u0646 \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0631\u06af\u0634\u062a\u06cc \u062f\u0631 \u0639\u0645\u0644\u060c \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u06cc\u06a9 \u0641\u0627\u06cc\u0644 \u0631\u0627 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u0641\u0627\u06cc\u0644 \u0628\u062e\u0648\u0627\u0646\u06cc\u0645 \u0648 \u0627\u0632 \u062a\u0645\u0627\u0633 \u0628\u0631\u06af\u0634\u062a\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645 print \u0627\u0632 \u0645\u062d\u062a\u0648\u06cc\u0627\u062a<\/p>\n<p>\u0627\u0648\u0644\u06cc\u0646 \u0642\u062f\u0645 \u0627\u06cc\u062c\u0627\u062f \u0641\u0627\u06cc\u0644 \u0627\u0633\u062a.  \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0648\u0631\u062f\u060c \u0645\u0627 \u0627\u0632 \u06cc\u06a9 \u0641\u0627\u06cc\u0644 \u0645\u062a\u0646\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0634\u0627\u0645\u0644 \u0633\u0637\u0631\u0647\u0627\u06cc \u06cc\u06a9 \u0634\u0639\u0631 \u0627\u0632 \u062a\u06cc \u0627\u0633 \u0627\u0644\u06cc\u0648\u062a \u0627\u0633\u062a.  \u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0641\u0627\u06cc\u0644 \u062e\u0648\u062f \u0631\u0627 \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646 \u06a9\u0646\u06cc\u062f.  \u0627\u06cc\u0646 \u0641\u0627\u06cc\u0644 \u0646\u0627\u0645 \u062f\u0627\u0631\u062f <code>poem.txt<\/code> \u0648 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0645\u0637\u0627\u0644\u0628 \u0632\u06cc\u0631 \u0631\u0627 \u062f\u0631 \u0622\u0646 \u0642\u0631\u0627\u0631 \u062f\u0647\u06cc\u062f.<\/p>\n<pre><code class=\"hljs\">\/\/ poem.txt\n\nMacavity - The Mystery Cat, by T. S. Eliot\n\nMacavity's a Mystery Cat: he's called the Hidden Paw--\nFor he's the master criminal who can defy the Law.\nHe's the bafflement of Scotland Yard, the Flying Squad's despair:\nFor when they reach the scene of crime--Macavity's not there!\n\nMacavity, Macavity, there's no one like Macavity,\nHe's broken every human law, he breaks the law of gravity.\nHis powers of levitation would make a fakir stare,\nAnd when you reach the scene of crime--Macavity's not there!\nYou may seek him in the basement, you may look up in the air--\nBut I tell you once and once again, Macavity's not there!\n<\/code><\/pre>\n<p>\u062f\u0631 \u0647\u0645\u0627\u0646 \u062f\u0627\u06cc\u0631\u06a9\u062a\u0648\u0631\u06cc\u060c \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u062e\u0648\u062f \u0631\u0627 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0627\u06cc\u0646 \u0641\u0627\u06cc\u0644 \u0634\u0639\u0631 \u0631\u0627 \u0645\u06cc \u062e\u0648\u0627\u0646\u062f \u0648 print \u0622\u0646 \u0631\u0627 \u0628\u0647 \u0639\u0642\u0628 \u0628\u0631\u06af\u0631\u062f\u0627\u0646\u062f.  \u067e\u0633 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u0633\u06cc\u0633\u062a\u0645 \u0639\u0627\u0645\u0644 \u0646\u062a\u06cc\u062c\u0647 \u0641\u0627\u06cc\u0644 \u062e\u0648\u0627\u0646\u062f\u0647 \u0634\u062f\u0647 \u0631\u0627 \u0628\u0631\u06af\u0631\u062f\u0627\u0646\u062f\u060c \u0686\u0627\u067e \u0641\u0627\u06cc\u0644 \u06cc\u0627 \u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u06cc\u06a9 \u062e\u0637\u0627 \u0628\u0631\u0627\u06cc \u0645\u0627 \u062f\u0631 \u06cc\u06a9 \u0641\u0631\u0627\u062e\u0648\u0627\u0646\u06cc \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc \u0634\u0648\u062f.  \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u062f\u0631 \u0632\u06cc\u0631 \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a\u060c \u062f\u0631 <code>readFile.js<\/code>\u060c \u067e\u0627\u0633\u062e \u062a\u0645\u0627\u0633 \u0634\u0645\u0627 \u067e\u0633 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u0639\u0627\u0645\u0644 \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f process \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u062f.  \u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u0627\u06cc\u0646 \u0633\u06cc\u0633\u062a\u0645 \u0639\u0627\u0645\u0644 process \u0628\u0631\u0645\u06cc\u200c\u06af\u0631\u062f\u0627\u0646\u062f\u060c \u067e\u0627\u0633\u062e \u062a\u0645\u0627\u0633 Node.js \u06a9\u0647 \u0627\u0631\u0627\u0626\u0647 \u06a9\u0631\u062f\u0647\u200c\u0627\u06cc\u062f \u0642\u0631\u0627\u0631 \u0645\u06cc\u200c\u06af\u06cc\u0631\u062f \u0631\u0648\u06cc \u062d\u0644\u0642\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f\u06cc \u06a9\u0647 \u0628\u0627\u06cc\u062f \u067e\u0631\u062f\u0627\u0632\u0634 \u0634\u0648\u062f\u060c \u06a9\u0647 \u067e\u0633 \u0627\u0632 \u0631\u0633\u06cc\u062f\u0646 \u062d\u0644\u0642\u0647 \u0628\u0647 \u0622\u0646\u060c \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f process.<\/p>\n<p>\u0633\u067e\u0633 \u062a\u0645\u0627\u0633 \u067e\u0627\u0633\u062e \u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0647\u0631 \u06a9\u0627\u0631\u06cc \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u062f\u060c \u0627\u0632 \u0628\u0647 \u0631\u0648\u0632 \u0631\u0633\u0627\u0646\u06cc \u0648\u0636\u0639\u06cc\u062a \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647\u060c \u0631\u0633\u06cc\u062f\u06af\u06cc \u0628\u0647 \u06cc\u06a9 \u062e\u0637\u0627\u060c \u062f\u0631 \u0635\u0648\u0631\u062a \u0648\u062c\u0648\u062f\u060c \u0648 \u062e\u0631\u0648\u062c \u06a9\u0627\u0631\u0628\u0631 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645\u060c \u0627\u0646\u062c\u0627\u0645 \u0647\u06cc\u0686 \u06a9\u0627\u0631\u06cc \u06cc\u0627 \u062d\u062a\u06cc \u067e\u0627\u06cc\u0627\u0646 \u062f\u0627\u062f\u0646 \u0628\u0647 Node. process \u0628\u0647 \u0637\u0648\u0631 \u06a9\u0627\u0645\u0644<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-comment\">\/\/ readFile.js<\/span>\n\n<span class=\"hljs-keyword\">const<\/span> fs = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'fs'<\/span>);\n\n<span class=\"hljs-comment\">\/\/ Attempt to read the poem file<\/span>\n<span class=\"hljs-comment\">\/\/ Attach a callback to handle a successful read and print the contents to console<\/span>\nfs.readFile(<span class=\"hljs-string\">'.\/poem.txt'<\/span>, <span class=\"hljs-string\">'utf-8'<\/span>, <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">err, data<\/span>) <\/span>{\n    <span class=\"hljs-keyword\">if<\/span> (err) <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">console<\/span>.error(err);\n\n    <span class=\"hljs-keyword\">let<\/span> poem = data.toString();\n    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Here is the poem of the day...\\n\\n'<\/span>);\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">console<\/span>.log(data);\n});\n<\/code><\/pre>\n<p>\u0627\u06cc\u0646 \u06a9\u062f \u0631\u0627 \u0628\u0627 <code>node readFile.js<\/code>.  \u0641\u0627\u06cc\u0644 \u062e\u0648\u0627\u0646\u062f\u0647 \u062e\u0648\u0627\u0647\u062f \u0634\u062f \u0648 console \u0628\u0627\u06cc\u062f print \u0634\u0639\u0631 \u0628\u0647 \u062a\u0648 \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u062f  \u0627\u06af\u0631 \u0627\u06cc\u0646\u0637\u0648\u0631 \u0646\u06cc\u0633\u062a print \u0628\u0631\u0627\u06cc \u0645\u062b\u0627\u0644\u060c \u0627\u06af\u0631 \u0686\u0646\u06cc\u0646 \u0641\u0627\u06cc\u0644\u06cc \u062f\u0631 \u0645\u0633\u06cc\u0631 \u0645\u0634\u062e\u0635 \u0634\u062f\u0647 \u0648\u062c\u0648\u062f \u0646\u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f\u060c \u062e\u0637\u0627\u06cc \u0631\u062e \u062f\u0627\u062f\u0647 \u0631\u0627 \u062d\u0630\u0641 \u06a9\u0646\u06cc\u062f.<\/p>\n<p>\u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u062a\u0644\u0641\u0646\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u06cc\u06a9\u200c\u0628\u0627\u0631\u0647 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u060c \u062e\u0637\u0627\u0647\u0627 \u0648 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0645\u0646\u0627\u0633\u0628 \u0647\u0633\u062a\u0646\u062f.  \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u062a\u0645\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0631\u06af\u0634\u062a\u06cc \u0632\u0645\u0627\u0646\u06cc \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0634\u0648\u0646\u062f \u06a9\u0647 \u062f\u0631 \u0686\u0646\u062f\u06cc\u0646 \u0633\u0637\u062d \u062f\u0631 \u0639\u0645\u0642 \u0642\u0631\u0627\u0631 \u06af\u06cc\u0631\u0646\u062f.  \u06cc\u06a9\u06cc \u062f\u06cc\u06af\u0631 \u0627\u0632 \u0631\u0627\u0647 \u0647\u0627\u06cc \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646 \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Event Listeners \u0627\u0633\u062a \u06a9\u0647 \u062f\u0631 \u0628\u062e\u0634 \u0628\u0639\u062f\u06cc \u0628\u0647 \u0622\u0646 \u067e\u0631\u062f\u0627\u062e\u062a\u0647 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<h2 id=\"respondingtoeventswitheventlisteners\"><span class=\"ez-toc-section\" id=\"%d9%be%d8%a7%d8%b3%d8%ae%da%af%d9%88%db%8c%db%8c_%d8%a8%d9%87_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af%d9%87%d8%a7_%d8%a8%d8%a7_%d8%b4%d9%86%d9%88%d9%86%d8%af%da%af%d8%a7%d9%86_%d8%b1%d9%88%db%8c%d8%af%d8%a7%d8%af\"><\/span>\u067e\u0627\u0633\u062e\u06af\u0648\u06cc\u06cc \u0628\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0628\u0627 \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u062a\u0648\u0627\u0628\u0639\u06cc \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u0632\u0645\u0627\u0646\u06cc \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u0646\u062f \u06a9\u0647 \u0627\u0646\u0648\u0627\u0639 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u062e\u0627\u0635 \u0631\u062e \u0645\u06cc \u062f\u0647\u0646\u062f.  \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644\u060c \u0647\u0646\u06af\u0627\u0645 \u062e\u0648\u0627\u0646\u062f\u0646 \u06cc\u06a9 \u0641\u0627\u06cc\u0644\u060c \u0627\u06cc\u062c\u0627\u062f \u0627\u062a\u0635\u0627\u0644 \u0628\u0647 \u0633\u0631\u0648\u0631 \u06cc\u0627 \u062c\u0633\u062a\u062c\u0648 \u062f\u0631 \u06cc\u06a9 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647\u060c \u0645\u0627\u0698\u0648\u0644 \u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0645\u0627 \u0627\u0632 \u0622\u0646\u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u06cc\u0645\u060c \u0645\u0627\u0646\u0646\u062f <code>fs<\/code>\u060c <code>net<\/code>\u060c \u06cc\u0627 <code>mongoose<\/code>\u060c \u0647\u0645\u0647 \u062f\u0627\u0631\u0627\u06cc \u0627\u0646\u0648\u0627\u0639 \u0631\u0648\u06cc\u062f\u0627\u062f \u062f\u0627\u062e\u0644\u06cc \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u0645\u0646\u062a\u0634\u0631 \u062e\u0648\u0627\u0647\u0646\u062f \u06a9\u0631\u062f.<\/p>\n<p>\u0627\u0634\u06cc\u0627\u06cc\u06cc \u06a9\u0647 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0631\u0627 \u0633\u0627\u0637\u0639 \u0645\u06cc \u06a9\u0646\u0646\u062f\u060c \u067e\u0627\u06cc\u0647 \u0631\u0627 \u06af\u0633\u062a\u0631\u0634 \u0645\u06cc \u062f\u0647\u0646\u062f <code>EventEmitter<\/code> \u0634\u06cc\u060c \u06a9\u0647 \u0627\u0632 \u062f\u0627\u062e\u0644\u06cc \u0645\u06cc \u0622\u06cc\u062f <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/nodejs.org\/api\/events.html\">\u0645\u0646\u0627\u0633\u0628\u062a \u0647\u0627<\/a> \u0645\u062f\u0648\u0644.<\/p>\n<p>\u0628\u0631\u0646\u0627\u0645\u0647 \u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0645\u06a9\u0627\u0646\u06cc\u0633\u0645 \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u0628\u0647 \u0627\u06cc\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u067e\u0627\u0633\u062e \u062f\u0647\u062f.  \u0628\u0647 \u0637\u0648\u0631 \u0645\u0639\u0645\u0648\u0644\u060c \u0634\u0645\u0627 \u06cc\u06a9 \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u06a9\u062f \u0627\u0632 \u0637\u0631\u06cc\u0642 \u06a9\u0644\u0645\u0647 \u06a9\u0644\u06cc\u062f\u06cc &#8221; \u067e\u06cc\u0648\u0633\u062a \u0645\u06cc \u06a9\u0646\u06cc\u062f.\u0631\u0648\u06cc&#8221;\u060c \u0628\u0647 \u062f\u0646\u0628\u0627\u0644 \u0622\u0646 \u06cc\u06a9 \u0631\u0634\u062a\u0647 \u06a9\u0647 \u0646\u0648\u0639 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0645\u0634\u062e\u0635 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0648 \u0633\u067e\u0633 \u06cc\u06a9 \u062a\u0627\u0628\u0639\u060c \u06a9\u0647 \u06a9\u062f\u06cc \u0627\u0633\u062a \u06a9\u0647 \u0647\u0646\u06af\u0627\u0645 \u0648\u0642\u0648\u0639 \u0631\u0648\u06cc\u062f\u0627\u062f \u0627\u062c\u0631\u0627 \u0645\u06cc \u0634\u0648\u062f.<\/p>\n<p>\u0628\u0631\u0627\u06cc \u0645\u0634\u0627\u0647\u062f\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u0633\u0631\u0648\u0631\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0628\u0627 Cat API \u062a\u0639\u0627\u0645\u0644 \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f \u0648 \u067e\u0627\u0633\u062e\u200c\u0647\u0627\u06cc API \u0631\u0627 \u062a\u062c\u0632\u06cc\u0647 \u06a9\u0646\u062f.  \u0633\u0631\u0648\u0631 \u0645\u0627 \u0633\u067e\u0633 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0647\u0627 \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f \u0648 \u062a\u0635\u0648\u06cc\u0631 &#8220;\u06af\u0631\u0628\u0647 \u0631\u0648\u0632&#8221; \u0631\u0627 \u0628\u0647 \u0628\u0627\u0632\u062f\u06cc\u062f\u06a9\u0646\u0646\u062f\u06af\u0627\u0646 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f.  \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0645\u0627 \u0628\u0627 \u0622\u0646\u0647\u0627 \u06a9\u0627\u0631 \u062e\u0648\u0627\u0647\u06cc\u0645 \u06a9\u0631\u062f \u0628\u062e\u0634\u06cc \u0627\u0632 \u0622\u0646 \u0647\u0633\u062a\u0646\u062f <code>http<\/code> \u0645\u062f\u0648\u0644.<\/p>\n<p>\u0645\u0627 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0627\u0632 a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062e\u0648\u0627\u0647\u06cc\u0645 \u06a9\u0631\u062f <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.npmjs.com\/package\/xml2js\">\u0645\u0627\u0698\u0648\u0644 xml2js<\/a> \u0628\u0631\u0627\u06cc \u062a\u062c\u0632\u06cc\u0647 \u067e\u0627\u0633\u062e \u0647\u0627\u06cc XML \u06a9\u0647 Cat API \u062a\u0648\u0644\u06cc\u062f \u0645\u06cc \u06a9\u0646\u062f.  \u0628\u0631\u0627\u06cc \u0646\u0635\u0628 <code>xml2js<\/code>\u060c \u0645\u06cc \u062e\u0648\u0627\u0647\u06cc\u062f \u062f\u0633\u062a\u0648\u0631 \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f <code>npm install xml2js<\/code> \u062f\u0631 \u06cc\u06a9 \u0641\u0647\u0631\u0633\u062a \u067e\u0631\u0648\u0698\u0647 \u0645\u0646\u0627\u0633\u0628<\/p>\n<p>\u067e\u0633 \u0627\u0632 \u0646\u0635\u0628 \u0645\u0627\u0698\u0648\u0644\u060c \u062f\u0648 \u0641\u0627\u06cc\u0644 \u062f\u0631 \u062f\u0627\u06cc\u0631\u06a9\u062a\u0648\u0631\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f. <code>cats.html<\/code>\u060c \u0648 <code>cats.js<\/code>.  \u062f\u0627\u062e\u0644 <code>cats.html<\/code>\u060c \u0642\u0633\u0645\u062a \u062c\u0644\u0648\u06cc\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0645\u0627 \u0631\u0627 \u0642\u0631\u0627\u0631 \u062f\u0647\u06cc\u062f.  \u0627\u06cc\u0646 \u0628\u0647 \u0633\u0627\u062f\u06af\u06cc \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u06af\u0631\u0628\u0647 \u0627\u06cc \u0631\u0627 \u06a9\u0647 \u0642\u0631\u0627\u0631 \u0627\u0633\u062a \u062a\u062c\u0632\u06cc\u0647 \u06a9\u0646\u06cc\u0645 \u0646\u0645\u0627\u06cc\u0634 \u0645\u06cc \u062f\u0647\u062f.<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-comment\">&lt;!-- cats.html --&gt;<\/span>\n<span class=\"hljs-meta\">&lt;!DOCTYPE <span class=\"hljs-meta-keyword\">html<\/span>&gt;<\/span>\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">html<\/span> <span class=\"hljs-attr\">lang<\/span>=<span class=\"hljs-string\">\"en\"<\/span>&gt;<\/span>\n  <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">head<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">meta<\/span> <span class=\"hljs-attr\">charset<\/span>=<span class=\"hljs-string\">\"utf-8\"<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">meta<\/span> <span class=\"hljs-attr\">http-equiv<\/span>=<span class=\"hljs-string\">\"X-UA-Compatible\"<\/span> <span class=\"hljs-attr\">content<\/span>=<span class=\"hljs-string\">\"IE=edge\"<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">meta<\/span> <span class=\"hljs-attr\">name<\/span>=<span class=\"hljs-string\">\"viewport\"<\/span> <span class=\"hljs-attr\">content<\/span>=<span class=\"hljs-string\">\"width=device-width, initial-scale=1\"<\/span>&gt;<\/span>\n\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">title<\/span>&gt;<\/span>Cats<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">title<\/span>&gt;<\/span>\n\n    <span class=\"hljs-comment\">&lt;!-- Bootstrap --&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">link<\/span> <span class=\"hljs-attr\">rel<\/span>=<span class=\"hljs-string\">\"stylesheet\"<\/span> <span class=\"hljs-attr\">href<\/span>=<span class=\"hljs-string\">\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/3.3.5\/css\/bootstrap.min.css\"<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">link<\/span> <span class=\"hljs-attr\">rel<\/span>=<span class=\"hljs-string\">\"stylesheet\"<\/span> <span class=\"hljs-attr\">href<\/span>=<span class=\"hljs-string\">\"https:\/\/maxcdn.bootstrapcdn.com\/font-awesome\/4.4.0\/css\/font-awesome.min.css\"<\/span>&gt;<\/span>\n\n    <span class=\"hljs-comment\">&lt;!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries --&gt;<\/span>\n    <span class=\"hljs-comment\">&lt;!-- WARNING: Respond.js doesn't work if you view the page via file:\/\/ --&gt;<\/span>\n    <span class=\"hljs-comment\">&lt;!--(if lt IE 9)&gt;\n      &lt;script src=\"https:\/\/oss.maxcdn.com\/libs\/html5shiv\/3.7.2\/html5shiv.js\"&gt;&lt;\/script&gt;\n      &lt;script src=\"https:\/\/oss.maxcdn.com\/libs\/respond.js\/1.4.2\/respond.min.js\"&gt;&lt;\/script&gt;\n    &lt;!(endif)--&gt;<\/span>\n  <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">head<\/span>&gt;<\/span>\n  <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">body<\/span>&gt;<\/span>\n\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">div<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"container-fluid\"<\/span>&gt;<\/span>\n      <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">div<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"col-md-8 col-md-offset-2\"<\/span>&gt;<\/span>\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">h1<\/span>&gt;<\/span>Cats Of Silicon Valley<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">h1<\/span>&gt;<\/span>\n\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">h2<\/span>&gt;<\/span>Welcome to the Cat Of The Day<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">h2<\/span>&gt;<\/span>\n\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">img<\/span> <span class=\"hljs-attr\">src<\/span>=<span class=\"hljs-string\">IMGSRC<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"img-fluid\"<\/span> <span class=\"hljs-attr\">alt<\/span>=<span class=\"hljs-string\">\"Responsive image\"<\/span>&gt;<\/span>\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">br<\/span>&gt;<\/span>\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">label<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"primary\"<\/span>&gt;<\/span>Source: SOURCE<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">label<\/span>&gt;<\/span>\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">br<\/span>&gt;<\/span>\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">a<\/span> <span class=\"hljs-attr\">href<\/span>=<span class=\"hljs-string\">\"\/\"<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"btn btn-primary btn-lg\"<\/span>&gt;<\/span>More Cats!<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">a<\/span>&gt;<\/span>\n      <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">div<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">div<\/span>&gt;<\/span>\n\n    <span class=\"hljs-comment\">&lt;!-- jQuery (necessary for Bootstrap's JavaScript plugins) --&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">script<\/span> <span class=\"hljs-attr\">src<\/span>=<span class=\"hljs-string\">\"https:\/\/ajax.googleapis.com\/ajax\/libs\/jquery\/1.11.3\/jquery.min.js\"<\/span>&gt;<\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">script<\/span>&gt;<\/span>\n    <span class=\"hljs-comment\">&lt;!-- Include all compiled plugins (below), or include individual files as needed --&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">script<\/span> <span class=\"hljs-attr\">src<\/span>=<span class=\"hljs-string\">\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/3.3.5\/js\/bootstrap.min.js\"<\/span>&gt;<\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">script<\/span>&gt;<\/span>\n  <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">body<\/span>&gt;<\/span>\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">html<\/span>&gt;<\/span>\n<\/code><\/pre>\n<p>\u0628\u062e\u0634 \u0639\u0645\u062f\u0647 \u0627\u06cc \u0627\u0632 \u0645\u0646\u0637\u0642 \u0645\u0627 \u062f\u0631 \u06a9\u062f \u0633\u0645\u062a \u0633\u0631\u0648\u0631 \u0627\u0633\u062a \u06a9\u0647 \u0628\u0627 \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f.  \u0627\u06cc\u0646 \u0645\u0648\u062c\u0648\u062f \u062f\u0631 <code>cats.js<\/code> \u0641\u0627\u06cc\u0644.  \u0628\u0631\u0627\u06cc \u0645\u0634\u0627\u0647\u062f\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u06a9\u062f \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u06a9\u062f \u0632\u06cc\u0631 \u0631\u0627 \u062f\u0627\u062e\u0644 \u0641\u0627\u06cc\u0644 \u0642\u0631\u0627\u0631 \u062f\u0647\u06cc\u062f\u060c \u0633\u067e\u0633 \u0622\u0646 \u0631\u0627 \u0628\u0627 \u0622\u0646 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f <code>node cats.js<\/code>\u060c \u0648 \u062f\u0631 \u0645\u0631\u0648\u0631\u06af\u0631 \u062e\u0648\u062f\u060c \u0628\u0627\u0632\u062f\u06cc\u062f \u06a9\u0646\u06cc\u062f <code>http:\/\/localhost:4000<\/code>.<\/p>\n<pre><code class=\"hljs\"><span class=\"hljs-comment\">\/\/ cat.js<\/span>\n\n<span class=\"hljs-keyword\">const<\/span> http = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'http'<\/span>);\n<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> xml2js = <span class=\"hljs-built_in\">require<\/span>(<span class=\"hljs-string\">'xml2js'<\/span>);\n\n<span class=\"hljs-comment\">\/\/ We will get images from the CatAPI https:\/\/thecatapi.com\/<\/span>\n<span class=\"hljs-keyword\">let<\/span> catApi = <span class=\"hljs-string\">'http:\/\/thecatapi.com\/api\/images\/get\u061fformat=xml&amp;results_per_page=1'<\/span>;\n\n<span class=\"hljs-keyword\">let<\/span> catUrl = <span class=\"hljs-string\">''<\/span>;\n<span class=\"hljs-keyword\">let<\/span> catSource = <span class=\"hljs-string\">''<\/span>;\n\n<span class=\"hljs-keyword\">let<\/span> server = http.createServer(<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">req, res<\/span>) <\/span>{\n    <span class=\"hljs-comment\">\/\/ Get fresh cat data from the Cat API<\/span>\n    http.get(catApi, <span class=\"hljs-function\">(<span class=\"hljs-params\">res<\/span>) =&gt;<\/span> {\n        <span class=\"hljs-keyword\">let<\/span> data = <span class=\"hljs-string\">''<\/span>;\n    \n        <span class=\"hljs-comment\">\/\/ Attach event listener for when receiving data from the remote server is complete<\/span>\n        res.\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\">'***We have completed cat data\\n***'<\/span>);\n            <span class=\"hljs-built_in\">console<\/span>.log(data);\n      \n            <span class=\"hljs-keyword\">let<\/span> parser = <span class=\"hljs-keyword\">new<\/span> xml2js.Parser();\n            <span class=\"hljs-keyword\">return<\/span> parser.parseString(data, <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">err, imgxml<\/span>) <\/span>{\n                <span class=\"hljs-keyword\">if<\/span> (err) {\n                    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'Error parsing cat data'<\/span>);\n                } <span class=\"hljs-keyword\">else<\/span> {\n                    <span class=\"hljs-keyword\">let<\/span> imgjson = <span class=\"hljs-built_in\">JSON<\/span>.parse(<span class=\"hljs-built_in\">JSON<\/span>.stringify(imgxml));\n        \n                    <span class=\"hljs-built_in\">console<\/span>.log(<span class=\"hljs-string\">'***We have cat JSON***'<\/span>);\n                    <span class=\"hljs-built_in\">console<\/span>.log(imgjson);\n        \n                    catUrl = imgjson.response.data(<span class=\"hljs-number\">0<\/span>).images(<span class=\"hljs-number\">0<\/span>).image(<span class=\"hljs-number\">0<\/span>).url(<span class=\"hljs-number\">0<\/span>);\n                    <span class=\"hljs-keyword\">return<\/span> catSource = imgjson.response.data(<span class=\"hljs-number\">0<\/span>).images(<span class=\"hljs-number\">0<\/span>).image(<span class=\"hljs-number\">0<\/span>).source_url(<span class=\"hljs-number\">0<\/span>);\n                }\n            });\n        });\n    \n        <span class=\"hljs-comment\">\/\/ Event listener for the 'data' event<\/span>\n        <span class=\"hljs-comment\">\/\/ In this case, accumulate all the data so we can use it all at once later<\/span>\n        <span class=\"hljs-keyword\">return<\/span> res.\u0631\u0648\u06cc(<span class=\"hljs-string\">'data'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">xml<\/span>) =&gt;<\/span> {\n            <span class=\"hljs-keyword\">return<\/span> data += xml;\n        });\n    });\n\n    <span class=\"hljs-comment\">\/\/ Serve cat images from the CatAPI<\/span>\n    <span class=\"hljs-keyword\">return<\/span> fs.readFile(<span class=\"hljs-string\">'.\/cats.html'<\/span>, <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>(<span class=\"hljs-params\">err, cathtml<\/span>) <\/span>{\n        <span class=\"hljs-keyword\">if<\/span> (err) {\n            <span class=\"hljs-built_in\">console<\/span>.error(err);\n            <span class=\"hljs-keyword\">return<\/span> res.end(<span class=\"hljs-string\">'An error occurred'<\/span>);\n        }\n    \n        <span class=\"hljs-keyword\">let<\/span> html = cathtml.toString()\n                          .replace(<span class=\"hljs-string\">'IMGSRC'<\/span>, catUrl)\n                          .replace(<span class=\"hljs-string\">'SOURCE'<\/span>, catSource);\n    \n        res.writeHead(<span class=\"hljs-number\">200<\/span>, {\n            <span class=\"hljs-string\">'Content-Type'<\/span>: <span class=\"hljs-string\">'text\/html'<\/span>\n        });\n    \n        res.write(html);\n        <span class=\"hljs-keyword\">return<\/span> res.end();\n    });\n});\n\n<span class=\"hljs-comment\">\/\/ Run the server<\/span>\nserver.listen(<span class=\"hljs-number\">4000<\/span>);\n<\/code><\/pre>\n<p>\u062f\u0631 \u0632\u06cc\u0631 \u0628\u0647 \u062a\u0641\u0635\u06cc\u0644 \u0648\u0627\u0631\u062f \u06a9\u062f \u0645\u06cc \u0634\u0648\u06cc\u0645.  \u0647\u0645\u0686\u0646\u06cc\u0646 \u0628\u0647 \u0646\u0638\u0631\u0627\u062a \u062f\u0631 \u06a9\u062f \u0646\u06af\u0627\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n<p>\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0627\u0632 \u06a9\u062f \u0645\u06cc \u0628\u06cc\u0646\u06cc\u062f\u060c \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0645\u0627 \u0628\u0647 Cat API \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062c\u062f\u06cc\u062f \u06af\u0631\u0628\u0647 \u0631\u0627 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0645\u06cc \u06a9\u0646\u062f.  \u0633\u067e\u0633 \u0628\u0647 \u0627\u062c\u0631\u0627\u06cc Node.js \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc \u062f\u0647\u06cc\u0645 \u0628\u0647 \u0637\u0648\u0631 \u0639\u0627\u062f\u06cc \u0627\u062f\u0627\u0645\u0647 \u06cc\u0627\u0628\u062f.  \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u0645\u0627 \u062f\u0648 \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f \u0631\u0627 \u0628\u0631\u0627\u06cc \u0645\u0642\u0627\u0628\u0644\u0647 \u0628\u0627 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u062c\u062f\u06cc\u062f \u0627\u0632 API \u0631\u0627\u0647 \u062f\u0648\u0631 \u0645\u062a\u0635\u0644 \u0645\u06cc \u06a9\u0646\u06cc\u0645.  \u0627\u0648\u0644\u06cc\u0646 \u0645\u0648\u0631\u062f \u0627\u0632 \u0627\u06cc\u0646\u0647\u0627 \u06cc\u06a9 &#8220;\u0631\u0648\u06cc \u067e\u0627\u06cc\u0627\u0646&#8221; \u0634\u0646\u0648\u0646\u062f\u0647 \u0631\u0648\u06cc\u062f\u0627\u062f. \u0648\u0642\u062a\u06cc \u06cc\u06a9 \u0628\u0627\u0631 \u06a9\u0627\u0645\u0644 cat \u0627\u0632 Cat API \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u06cc\u0645\u060c \u0633\u067e\u0633 \u062e\u0648\u062f \u0631\u0627 \u0628\u0647 \u0631\u0648\u0632 \u0645\u06cc \u06a9\u0646\u06cc\u0645 page \u0628\u0627 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0648 \u062a\u0635\u0648\u06cc\u0631 \u062c\u062f\u06cc\u062f  \u062f\u0633\u062a\u0647 \u062f\u0648\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f\u06cc \u06a9\u0647 \u0645\u0627 \u0628\u0647 \u0622\u0646 \u06af\u0648\u0634 \u0645\u06cc \u062f\u0647\u06cc\u0645 \u0631\u0648\u06cc\u062f\u0627\u062f &#8220;\u062f\u0627\u062f\u0647&#8221; \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0632\u0645\u0627\u0646\u06cc \u0641\u0639\u0627\u0644 \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u062c\u062f\u06cc\u062f\u06cc \u0627\u0632 \u0631\u0627\u0647 \u062f\u0648\u0631 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f host.  \u062f\u0631 \u0627\u06cc\u0646 \u0635\u0648\u0631\u062a\u060c \u062f\u0627\u062f\u0647\u200c\u0647\u0627 \u0631\u0627 \u0628\u0627\u0641\u0631 \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645 \u0648 \u0622\u0646\u200c\u0647\u0627 \u0631\u0627 \u0628\u0647 \u0630\u062e\u06cc\u0631\u0647\u200c\u06af\u0627\u0647 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u0645\u0648\u0642\u062a \u062e\u0648\u062f \u0627\u0636\u0627\u0641\u0647 \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.<\/p>\n<p>\u0627\u06a9\u0646\u0648\u0646\u060c \u0628\u0647 \u0644\u0637\u0641 \u0642\u062f\u0631\u062a \u0634\u0646\u0648\u0646\u062f\u06af\u0627\u0646 \u0631\u0648\u06cc\u062f\u0627\u062f\u060c \u062f\u0631\u06cc\u0627\u0641\u062a \u062a\u0635\u0627\u0648\u06cc\u0631 \u062c\u062f\u06cc\u062f \u06af\u0631\u0628\u0647 \u0631\u0627 \u0628\u0647 \u062f\u0644\u062e\u0648\u0627\u0647 \u0622\u0633\u0627\u0646 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645.<\/p>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/rasanegar.com\/blog\/wp-content\/uploads\/2024\/01\/how-to-use-timers-events-node-js-1.png\" alt=\"\u06af\u0631\u0628\u0647 \u0631\u0648\u0632 1\" title=\"\"><\/p>\n<p>\u0628\u0627\u0632\u062f\u06cc\u062f\u06a9\u0646\u0646\u062f\u06af\u0627\u0646 \u0648\u0628 \u0633\u0627\u06cc\u062a \u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u062a\u0635\u0627\u0648\u06cc\u0631 \u062c\u062f\u06cc\u062f \u06af\u0631\u0628\u0647 \u0631\u0648\u0632 \u0631\u0627 \u0628\u0627 \u06a9\u0644\u06cc\u06a9 \u06cc\u06a9 \u062f\u06a9\u0645\u0647 \u062f\u0631\u06cc\u0627\u0641\u062a \u06a9\u0646\u0646\u062f.<\/p>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/rasanegar.com\/blog\/wp-content\/uploads\/2024\/01\/how-to-use-timers-events-node-js-2.png\" alt=\"\u06af\u0631\u0628\u0647 \u0631\u0648\u0632 2\" title=\"\"><\/p>\n<p>\u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u062a\u0627\u06cc\u0645\u0631\u0647\u0627 \u062f\u0631 Node.js \u0628\u0633\u06cc\u0627\u0631 \u0628\u06cc\u0634\u062a\u0631 \u0627\u0632 \u0622\u0646\u0686\u0647 \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u062a\u0648\u0636\u06cc\u062d \u062f\u0627\u062f\u06cc\u0645 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f.  \u0645\u0648\u0636\u0648\u0639 \u0628\u0639\u062f\u06cc \u062e\u0648\u0628 \u0628\u0631\u0627\u06cc \u0628\u0631\u0631\u0633\u06cc \u0627\u06cc\u0646 \u0627\u0633\u062a \u06a9\u0647 <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/nodejs.org\/api\/events.html#events_class_eventemitter\">\u0633\u0627\u0637\u0639 \u06a9\u0646\u0646\u062f\u0647 \u0647\u0627\u06cc \u0631\u0648\u06cc\u062f\u0627\u062f<\/a>\u060c \u06a9\u0647 \u0628\u0647 \u0634\u0645\u0627 \u0642\u062f\u0631\u062a \u0628\u06cc\u0634\u062a\u0631\u06cc \u062f\u0631 \u0645\u0648\u0631\u062f \u0627\u0646\u0648\u0627\u0639 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc\u06cc \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0628\u0631\u0646\u0627\u0645\u0647 \u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0627\u0632 \u0622\u0646\u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u062f.<\/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 1403-01-26 13:20:04<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;16533&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;\u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0627\u06cc\u0645\u0631\u0647\u0627 \u0648 \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u062f\u0631 Node.jsNode.js \u062f\u0627\u0631\u0627\u06cc \u0686\u0646\u062f\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631 \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0632\u0645\u0627\u0646 \u0628\u0646\u062f\u06cc \u0627\u062c\u0631\u0627\u06cc \u06a9\u062f \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0627\u0628\u0632\u0627\u0631\u0647\u0627\u06cc \u06a9\u0645\u06a9\u06cc\u060c \u062a\u0631\u06a9\u06cc\u0628\u06cc\u060c \u0628\u0647 \u0634\u0645\u0627 \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f \u06a9\u0647 \u0628\u0647 \u0635\u0648\u0631\u062a \u0648\u0627\u06a9\u0646\u0634\u06cc \u062f\u0631 \u0632\u0645\u0627\u0646 \u0645\u0646\u0627\u0633\u0628 \u067e\u0627\u0633\u062e \u062f\u0647\u06cc\u062f\u060c \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644: \u067e\u0627\u06a9 \u06a9\u0631\u062f\u0646 \u062f\u0627\u062f\u0647\u200c\u0647\u0627\u06cc \u062c\u0644\u0633\u0647 \u0632\u0645\u0627\u0646\u06cc \u06a9\u0647 \u06a9\u0627\u0631\u0628\u0631 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u062e\u0627\u0631\u062c \u0645\u06cc\u200c\u0634\u0648\u062f \u0632\u0645\u0627\u0646\u200c\u0628\u0646\u062f\u06cc \u0632\u0645\u0627\u0646\u200c\u0628\u0646\u062f\u06cc \u0628\u0631\u0627\u06cc \u062f\u0631\u06cc\u0627\u0641\u062a \u0646\u062a\u0627\u06cc\u062c \u0627\u0632 \u06cc\u06a9 \u062a\u0645\u0627\u0633 API...&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\" 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[&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":16534,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1772,620],"tags":[],"class_list":["post-16533","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\/16533","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=16533"}],"version-history":[{"count":0,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/posts\/16533\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/media\/16534"}],"wp:attachment":[{"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/media?parent=16533"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/categories?post=16533"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rasanegaar.com\/blog\/wp-json\/wp\/v2\/tags?post=16533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}