--- title: Top of JS Topics mostly failed by developers | daily.dev description: The Top of JS Topics mostly failed by developers. Top-5 most failed JS topics: Hoisting modules, Promises and scope. To answer correctly a respondent has to... canonical: https://daily.dev/posts/top-of-js-topics-mostly-failed-by-developers-njjvnt4ys twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Top of JS Topics mostly failed by developers | daily.dev og:description: The Top of JS Topics mostly failed by developers. Top-5 most failed JS topics: Hoisting modules, Promises and scope. To answer correctly a respondent has to... og:url: https://daily.dev/posts/top-of-js-topics-mostly-failed-by-developers-njjvnt4ys og:image: https://api.daily.dev/og/posts/NJJVNT4Ys.png og:image:alt: Top of JS Topics mostly failed by developers og:image:width: 1200 og:image:height: 630 og:locale: en --- [Medium](https://daily.dev/sources/medium%5Fjs) [Read post](https://api.daily.dev/r/NJJVNT4Ys) # [Top of JS Topics mostly failed by developers](https://api.daily.dev/r/NJJVNT4Ys "Go to post") The Top of JS Topics mostly failed by developers. Top-5 most failed JS topics: Hoisting modules, Promises and scope. To answer correctly a respondent has to have a deep JS knowledge and understand how an engine interprets the instructions. To solve some of the quizzes, the developer must understand several topics, and it is not known which one of them led to an incorrect answer. [#general-programming](/tags/general-programming "Check all #general-programming posts")[#javascript](/tags/javascript "Check all #javascript posts") Jul 20, 2022 • 5m read time • From [intspirit.medium.com](https://api.daily.dev/r/NJJVNT4Ys "intspirit.medium.com") [](https://api.daily.dev/r/NJJVNT4Ys "Go to post") Table of contents [You probably know how to use Promises, but do you know how they actually work?](https://api.daily.dev/r/NJJVNT4Ys "You probably know how to use Promises, but do you know how they actually work?") 19 Upvotes2 Comments Comment Bookmark Copy Share your thoughts Post Share this post [](https://daily.dev/sources/medium%5Fjs) [Medium](https://daily.dev/sources/medium%5Fjs "https://daily.dev/sources/medium_js") Medium\_JS is a curated collection of insights and tutorials on JavaScript development, designed to h... Read more 9.7K Followers • 39.3K Upvotes #### Would you recommend this post? Copy link Slack WhatsApp Facebook X New Squad Copy linkShare with your friends 19 2 ```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":"Top of JS Topics mostly failed by developers","url":"https://daily.dev/posts/top-of-js-topics-mostly-failed-by-developers-njjvnt4ys","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/top-of-js-topics-mostly-failed-by-developers-njjvnt4ys"},"datePublished":"2022-07-20T15:04:35.065Z","dateModified":"2022-07-21T07:41:49.751Z","description":"The Top of JS Topics mostly failed by developers. 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