--- title: SOLID Design Principles Every JavaScript Deveveloper... description: SOLID principles are five essential design rules that help JavaScript developers write cleaner, maintainable code. The guide covers Single Responsibility (one... canonical: https://daily.dev/posts/solid-design-principles-every-javascript-deveveloper-should-know-mpfhscndq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: SOLID Design Principles Every JavaScript Deveveloper Should Know | daily.dev og:description: SOLID principles are five essential design rules that help JavaScript developers write cleaner, maintainable code. The guide covers Single Responsibility (one... og:url: https://daily.dev/posts/solid-design-principles-every-javascript-deveveloper-should-know-mpfhscndq og:image: https://api.daily.dev/og/posts/MpFHScNdq.png og:image:alt: SOLID Design Principles Every JavaScript Deveveloper 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. # SOLID Design Principles Every JavaScript Deveveloper Should Know **[JS Development](https://daily.dev/sources/jsdevelopment)** · [@anliberant](https://daily.dev/anliberant) · 400 upvotes · 13 comments ## Summary SOLID principles are five essential design rules that help JavaScript developers write cleaner, maintainable code. The guide covers Single Responsibility (one function per purpose), Open/Closed (extend without modifying), Liskov Substitution (subclasses must be replaceable), Interface Segregation (avoid bloated interfaces), and Dependency Inversion (depend on abstractions). Each principle includes practical JavaScript examples showing violations and proper implementations, plus real-world applications and common interview questions. ## 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. **@orcdev** · 7 upvotes > Deveveloper ftw **@skeptiq** · 6 upvotes > That's a solid devevevevevelopment. **@alexakhremenko** · 2 upvotes > Bad article. This is how SOLID is understood incorrectly. For example, S - single responsibility doesn't mean that something should do one thing. “A class must have one and only one reason for change” ©R. Martin. Some good article for example https://medium.com/@denisrebrof/solid-common-misunderstandings-part-1-introduction-srp-d28245ac8e6b **@essijunior** · 1 upvotes > I like the way you organized your article, and because you added a quiz section at the end. > > Not always there, but important in my opinion. **@jollylollylion** · 0 upvotes > Very Useful, the wording & examples made it easy to understand - usually just understanding the jargon is a task itself! ## 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 - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#architecture](https://daily.dev/tags/architecture), [#design-patterns](https://daily.dev/tags/design-patterns) [View this post on daily.dev](https://daily.dev/posts/solid-design-principles-every-javascript-deveveloper-should-know-mpfhscndq) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/solid-design-principles-every-javascript-deveveloper-should-know-mpfhscndq","headline":"SOLID Design Principles Every JavaScript Deveveloper Should Know","text":"Shared: SOLID Design Principles Every JavaScript Deveveloper Should Know","url":"https://daily.dev/posts/solid-design-principles-every-javascript-deveveloper-should-know-mpfhscndq","datePublished":"2025-06-10T02:32:50.597Z","dateModified":"2025-06-10T02:33:28.684Z","author":{"@type":"Person","name":"Anton Liberant","url":"https://daily.dev/anliberant","image":"https://lh3.googleusercontent.com/a/AAcHTteX1jAsV7NIevHJk0k9z0vTRktfJmWn9I79VKpJ7Ypm1jqG=s96-c","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":3770}},"image":"https://media.daily.dev/image/upload/s--HRgLpUt6--/f_auto/v1722860399/public/Placeholder%2003","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":400},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":13}],"sharedContent":{"@type":"WebPage","url":"https://api.daily.dev/r/HTtakH5B0"},"comment":[{"@type":"Comment","text":"Deveveloper ftw","datePublished":"2025-06-14T10:03:26.926Z","url":"https://daily.dev/posts/MpFHScNdq#c-WoxxsVYOE","author":{"@type":"Person","name":"OrcDev","url":"https://daily.dev/orcdev","image":"https://avatars.githubusercontent.com/u/7549148?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":7}},{"@type":"Comment","text":"That’s a solid devevevevevelopment.","datePublished":"2025-06-14T18:57:43.306Z","url":"https://daily.dev/posts/MpFHScNdq#c-Cyd4ErDTM","author":{"@type":"Person","name":"The Skeptiq","url":"https://daily.dev/skeptiq","image":"https://media.daily.dev/image/upload/s--OTJ1UWI6--/f_auto/v1738074563/avatars/avatar_ic83Smu6jxYTzCXCWtIZf"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":6}},{"@type":"Comment","text":"Bad article. This is how SOLID is understood incorrectly. For example, S - single responsibility doesn’t mean that something should do one thing. “A class must have one and only one reason for change” ©R. Martin. 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