--- title: All about Promises in JavaScript | daily.dev description: Promises in JavaScript are objects that represent values that may not be immediately available. They are used to handle asynchronous operations and provide... canonical: https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: All about Promises in JavaScript | daily.dev og:description: Promises in JavaScript are objects that represent values that may not be immediately available. They are used to handle asynchronous operations and provide... og:url: https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns og:image: https://api.daily.dev/og/posts/gEIqdOZnS.png og:image:alt: All about Promises in JavaScript 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. # All about Promises in JavaScript **[Community Picks](https://daily.dev/sources/community)** · 7 min read · 102 upvotes · 7 comments ## Summary Promises in JavaScript are objects that represent values that may not be immediately available. They are used to handle asynchronous operations and provide benefits such as better readability, improved error handling, avoiding callback hell, ability to return a value, and better compatibility. Promises can be created using the Promise constructor and can be chained using then() and catch() methods. They can also be canceled using techniques like timeout, aborting a network request, or using a flag. Bluebird is a popular Promise library that provides advanced features like Promise cancellation. Multiple Promises can be executed in parallel using methods like Promise.all(), Promise.any(), Promise.race(), and Promise.allSettled(). ## 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. **@muddusar** · 2 upvotes > Yes appriciated amazing explain :) **@fabooy961** · 2 upvotes > Javascript promises to be a rabbithole - change my mind! > > (☞ﾟヮﾟ)☞ ☜(ﾟヮﾟ☜) **@kkurko** · 2 upvotes > Great explanation with good illustrations and it's easy to read! **@texx** · 2 upvotes > Awesome 👏 **@binaryhub** · 2 upvotes > One of the most important concepts to know about JavaScript. > > Without promises you can't do anything and also understand how it works! ## 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: [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns) ```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":"All about Promises in JavaScript","url":"https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns"},"datePublished":"2023-02-23T17:27:55.166Z","dateModified":"2024-04-09T19:04:47.646Z","description":"Promises in JavaScript are objects that represent values that may not be immediately available. They are used to handle asynchronous operations and provide...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f0e0d2e7bc085a2d978b89fec0fe7769?_a=AQAEufR","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f0e0d2e7bc085a2d978b89fec0fe7769?_a=AQAEufR","isAccessibleForFree":true,"articleSection":"Community Picks","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Community Picks","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1655817725/logos/community","url":"https://daily.dev/sources/community"},"commentCount":7,"discussionUrl":"https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":102},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":7}],"keywords":"webdev,javascript","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Community Picks","item":"https://daily.dev/sources/community"},{"@type":"ListItem","position":3,"name":"All about Promises in JavaScript"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/all-about-promises-in-javascript-geiqdozns","comment":[{"@type":"Comment","text":"Yes appriciated amazing explain :)","datePublished":"2023-02-24T08:54:34.901Z","url":"https://daily.dev/posts/gEIqdOZnS#c-F5S8A9AaC","author":{"@type":"Person","name":"Muddusar Zulfiqar","url":"https://daily.dev/muddusar","image":"https://lh3.googleusercontent.com/a-/AFdZucps17o68e21QKpdz2x9BYD6DO_MqoKYXWNEaJjg=s100"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"Javascript promises to be a rabbithole - change my mind!\n(☞ﾟヮﾟ)☞ ☜(ﾟヮﾟ☜)","datePublished":"2023-02-24T05:59:12.224Z","url":"https://daily.dev/posts/gEIqdOZnS#c-O5kD4ScPd","author":{"@type":"Person","name":"Le Fä De Le Lö","url":"https://daily.dev/fabooy961","image":"https://media.daily.dev/image/upload/v1677218265/avatars/avatar_H6lLM2y9S4Yf8VCWicpd8.jpg"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"Great explanation with good illustrations and it’s easy to read!","datePublished":"2023-02-25T13:04:22.370Z","url":"https://daily.dev/posts/gEIqdOZnS#c-FLKxn9r6k","author":{"@type":"Person","name":"Kirill Kurko","url":"https://daily.dev/kkurko","image":"https://avatars.githubusercontent.com/u/58859242?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"Awesome 👏","datePublished":"2023-02-27T14:58:17.152Z","url":"https://daily.dev/posts/gEIqdOZnS#c-0uoPZpLC9","author":{"@type":"Person","name":"Mark","url":"https://daily.dev/texx","image":"https://avatars.githubusercontent.com/u/7047461?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"One of the most important concepts to know about JavaScript.\nWithout promises you can’t do anything and also understand how it works!","datePublished":"2023-02-28T07:53:54.201Z","url":"https://daily.dev/posts/gEIqdOZnS#c-gzZcTclSE","author":{"@type":"Person","name":"Florin Mateescu","url":"https://daily.dev/binaryhub","image":"https://media.daily.dev/image/upload/v1677570663/avatars/avatar_GGEdcuNEt60l5hxqmnaWK.jpg"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}}]} ```