--- title: 4 JavaScript ES2018 Features You Should Know | daily.dev description: The ES2018 specification introduced four new features. These features are asynchronous iteration, rest/spread properties, Promise.prototype.finally() and... canonical: https://daily.dev/posts/4-javascript-es2018-features-you-should-know-ae0bfsd43 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: 4 JavaScript ES2018 Features You Should Know | daily.dev og:description: The ES2018 specification introduced four new features. These features are asynchronous iteration, rest/spread properties, Promise.prototype.finally() and... og:url: https://daily.dev/posts/4-javascript-es2018-features-you-should-know-ae0bfsd43 og:image: https://api.daily.dev/og/posts/Ae0bfsD43.png og:image:alt: 4 JavaScript ES2018 Features You Should Know og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # 4 JavaScript ES2018 Features You Should Know **[Hashnode](https://daily.dev/sources/hashnode)** · [@alimammiya](https://daily.dev/alimammiya) · 8 min read · 46 upvotes · 5 comments ## Summary The ES2018 specification introduced four new features. These features are asynchronous iteration, rest/spread properties, Promise.prototype.finally() and regular expression improvements. This tutorial will help you learn how these features work and how to use them. Asynchronous iteration is one of the lesser discussed ES2018 features. With asynchronous iteration we get asynchronous iterables and iterators. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@samukdev** · 1 upvotes > Thanks for sharing! :D **@blurk** · 1 upvotes > Very informative, thank you 😄 **@dshung1997** · 1 upvotes > Cool! Named capture groups are really helpful ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/4-javascript-es2018-features-you-should-know-ae0bfsd43) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"4 JavaScript ES2018 Features You Should Know","url":"https://daily.dev/posts/4-javascript-es2018-features-you-should-know-ae0bfsd43","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/4-javascript-es2018-features-you-should-know-ae0bfsd43"},"datePublished":"2021-03-23T04:56:56.281Z","dateModified":"2021-10-07T14:17:10.317Z","description":"The ES2018 specification introduced four new features. 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Named capture groups are really helpful","datePublished":"2021-03-25T03:32:38.495Z","url":"https://daily.dev/posts/Ae0bfsD43#c-eb8e1jAFm","author":{"@type":"Person","name":"Sy-Hung Doan","url":"https://daily.dev/dshung1997","image":"https://avatars2.githubusercontent.com/u/19758667?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}}]} ```