{"id":27596,"date":"2024-03-16T08:47:43","date_gmt":"2024-03-16T08:47:43","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/"},"modified":"2024-03-22T11:25:14","modified_gmt":"2024-03-22T11:25:14","slug":"how-to-use-await-and-async-in-es6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/","title":{"rendered":"How to use await and async in ES6?"},"content":{"rendered":"<p>In ES6, await and async are keywords used to handle asynchronous operations.<\/p>\n<p>The async keyword is used to define an asynchronous function that returns a Promise object. For example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">async<\/span> <span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">fetchData<\/span>(<span class=\"hljs-params\"><\/span>) {\r\n  <span class=\"hljs-comment\">\/\/ \u5f02\u6b65\u64cd\u4f5c<\/span>\r\n  <span class=\"hljs-keyword\">return<\/span> result;\r\n}\r\n<\/code><\/pre>\n<p>The &#8220;await&#8221; keyword is used to wait for the result of an expression that returns a Promise object, which can be an asynchronous function call, a Promise object, or any expression that returns a Promise object. When using the &#8220;await&#8221; keyword, it needs to be placed within an async function. For example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">async<\/span> <span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title function_\">fetchData<\/span>(<span class=\"hljs-params\"><\/span>) {\r\n  <span class=\"hljs-keyword\">const<\/span> result = <span class=\"hljs-keyword\">await<\/span> <span class=\"hljs-title function_\">fetch<\/span>(<span class=\"hljs-string\">'https:\/\/api.example.com\/data'<\/span>);\r\n  <span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(result);\r\n}\r\n<\/code><\/pre>\n<p>In the above example, the fetchData function is an asynchronous function that waits for the result of the Promise object returned by the fetch function using the await keyword.<\/p>\n<p>It is important to note that when using the await keyword, the code execution will pause until the asynchronous operation is completed and returns a result. This allows for writing asynchronous code in a synchronous manner when using the await keyword.<\/p>\n<p>At the same time, the await keyword can only be used in an async function, otherwise an error will be thrown.<\/p>\n<p>Furthermore, the expression following the await keyword can capture and handle errors of asynchronous operations, by using a try\/catch statement to catch errors for error handling.<\/p>\n<p>In summary, the &#8216;async&#8217; keyword is used to define asynchronous functions, while the &#8216;await&#8217; keyword is used to wait for the results of asynchronous operations, allowing asynchronous code to be written in a synchronous manner.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In ES6, await and async are keywords used to handle asynchronous operations. The async keyword is used to define an asynchronous function that returns a Promise object. For example: async function fetchData() { \/\/ \u5f02\u6b65\u64cd\u4f5c return result; } The &#8220;await&#8221; keyword is used to wait for the result of an expression that returns a Promise [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-27596","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to use await and async in ES6? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to use await and async in ES6?\" \/>\n<meta property=\"og:description\" content=\"In ES6, await and async are keywords used to handle asynchronous operations. The async keyword is used to define an asynchronous function that returns a Promise object. For example: async function fetchData() { \/\/ \u5f02\u6b65\u64cd\u4f5c return result; } The &#8220;await&#8221; keyword is used to wait for the result of an expression that returns a Promise [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T08:47:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T11:25:14+00:00\" \/>\n<meta name=\"author\" content=\"Sophia Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sophia Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\"},\"author\":{\"name\":\"Sophia Anderson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/19a24313de9c988db3d69226b4a40a30\"},\"headline\":\"How to use await and async in ES6?\",\"datePublished\":\"2024-03-16T08:47:43+00:00\",\"dateModified\":\"2024-03-22T11:25:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\"},\"wordCount\":242,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\",\"name\":\"How to use await and async in ES6? - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-16T08:47:43+00:00\",\"dateModified\":\"2024-03-22T11:25:14+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to use await and async in ES6?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/19a24313de9c988db3d69226b4a40a30\",\"name\":\"Sophia Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c726c09aa40e37115fb5c62d0c3ed62c16ca255d3763e2e3ae83a70ddf8c2175?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c726c09aa40e37115fb5c62d0c3ed62c16ca255d3763e2e3ae83a70ddf8c2175?s=96&d=mm&r=g\",\"caption\":\"Sophia Anderson\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/sophiaanderson\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"How to use await and async in ES6? - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/","og_locale":"en_US","og_type":"article","og_title":"How to use await and async in ES6?","og_description":"In ES6, await and async are keywords used to handle asynchronous operations. The async keyword is used to define an asynchronous function that returns a Promise object. For example: async function fetchData() { \/\/ \u5f02\u6b65\u64cd\u4f5c return result; } The &#8220;await&#8221; keyword is used to wait for the result of an expression that returns a Promise [&hellip;]","og_url":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-16T08:47:43+00:00","article_modified_time":"2024-03-22T11:25:14+00:00","author":"Sophia Anderson","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Sophia Anderson","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/"},"author":{"name":"Sophia Anderson","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/19a24313de9c988db3d69226b4a40a30"},"headline":"How to use await and async in ES6?","datePublished":"2024-03-16T08:47:43+00:00","dateModified":"2024-03-22T11:25:14+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/"},"wordCount":242,"commentCount":0,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/","url":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/","name":"How to use await and async in ES6? - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-16T08:47:43+00:00","dateModified":"2024-03-22T11:25:14+00:00","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-await-and-async-in-es6\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"How to use await and async in ES6?"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/19a24313de9c988db3d69226b4a40a30","name":"Sophia Anderson","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/c726c09aa40e37115fb5c62d0c3ed62c16ca255d3763e2e3ae83a70ddf8c2175?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c726c09aa40e37115fb5c62d0c3ed62c16ca255d3763e2e3ae83a70ddf8c2175?s=96&d=mm&r=g","caption":"Sophia Anderson"},"url":"https:\/\/www.silicloud.com\/blog\/author\/sophiaanderson\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/27596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=27596"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/27596\/revisions"}],"predecessor-version":[{"id":61836,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/27596\/revisions\/61836"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=27596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=27596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=27596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}