{"id":16301,"date":"2022-10-15T02:03:44","date_gmt":"2022-10-14T20:33:44","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-confirm-for-javascript-asynchronous-calls-closed\/"},"modified":"2022-10-15T02:03:44","modified_gmt":"2022-10-14T20:33:44","slug":"solved-how-to-confirm-for-javascript-asynchronous-calls-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-confirm-for-javascript-asynchronous-calls-closed\/","title":{"rendered":"[Solved] How to confirm for JavaScript asynchronous calls? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-73901163\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"73901163\" data-parentid=\"73899801\" data-score=\"1\" data-position-on-page=\"2\" data-highest-scored=\"0\" data-question-has-accepted-highest-score=\"0\" itemprop=\"suggestedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<blockquote>\n<p>an async function without an await expression will run synchronously. If there is an await expression inside the function body, however, the async function will always complete asynchronously.<\/p>\n<\/blockquote>\n<p>Yes, everything in the async function will run synchronously until <code>await<\/code> is encountered.<\/p>\n<p>Examples:<\/p>\n<\/p>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"false\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>async function withoutAwait() {\n  console.log('without await')\n}\n\nasync function withAwait() {\n  await 0\n  console.log('with await')\n}\n\nconsole.log('start')\nwithoutAwait()\nwithAwait()\nconsole.log('end')<\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"false\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>let a = 0\n\nasync function changeA() {\n  a = 20\n  await 0\n  a = 30\n}\n\nconsole.log('start', a)\nchangeA().then(() =&gt; console.log('after change', a))\nconsole.log('end', a)<\/code><\/pre>\n<\/div>\n<\/div>\n<p>P.S.<\/p>\n<p>JavaScript code runs in one thread. No two lines of code run at the same time.<\/p>\n<p>Asnychrouns code just stops executing when it encounters <code>await<\/code> and goes back to the next fragment when the thread is free.<\/p>\n<\/p>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"false\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>const results = []\n\nasync function f1() {\n  for (let i = 0; i &lt; 10; i += 1) {\n    await results.push('f1')\n    await 0\n  }\n}\n\nasync function f2() {\n  for (let i = 0; i &lt; 10; i += 1) {\n    await results.push('f2')\n  }\n}\n\nf1()\nf2()\nsetTimeout(() =&gt; {\n  console.log(results)\n}, 100)<\/code><\/pre>\n<\/div>\n<\/div><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">3<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to confirm for JavaScript asynchronous calls? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] an async function without an await expression will run synchronously. If there is an await expression inside the function body, however, the async function will always complete asynchronously. Yes, everything in the async function will run synchronously until await is encountered. Examples: async function withoutAwait() { console.log(&#8216;without await&#8217;) } async function withAwait() { await &#8230; <a title=\"[Solved] How to confirm for JavaScript asynchronous calls? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-confirm-for-javascript-asynchronous-calls-closed\/\" aria-label=\"More on [Solved] How to confirm for JavaScript asynchronous calls? [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1144,333],"class_list":["post-16301","post","type-post","status-publish","format-standard","hentry","category-solved","tag-async-await","tag-javascript"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] How to confirm for JavaScript asynchronous calls? 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