--- title: KISS, DRY, SoC, and YAGNI: The Only 4 Software... description: A walkthrough of four foundational software design principles—KISS, DRY, SoC, and YAGNI—each explained with before/after code examples in JavaScript. Covers... canonical: https://daily.dev/posts/kiss-dry-soc-and-yagni-the-only-4-software-principles-you-actually-need-vuqtrjfce twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: KISS, DRY, SoC, and YAGNI: The Only 4 Software Principles You Actually Need | daily.dev og:description: A walkthrough of four foundational software design principles—KISS, DRY, SoC, and YAGNI—each explained with before/after code examples in JavaScript. Covers... og:url: https://daily.dev/posts/kiss-dry-soc-and-yagni-the-only-4-software-principles-you-actually-need-vuqtrjfce og:image: https://api.daily.dev/og/posts/VUQtrjfce.png og:image:alt: KISS, DRY, SoC, and YAGNI: The Only 4 Software Principles You Actually Need 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. # KISS, DRY, SoC, and YAGNI: The Only 4 Software Principles You Actually Need **[Medium](https://daily.dev/sources/medium_js)** · [@tararoutray](https://daily.dev/tararoutray) · 9 min read · 1 upvotes · 0 comments ## Summary A walkthrough of four foundational software design principles—KISS, DRY, SoC, and YAGNI—each explained with before/after code examples in JavaScript. Covers not just how to apply each principle but also how developers commonly overcorrect (over-DRYing, over-separating concerns, or over-engineering for imagined futures), along with quick heuristics for spotting violations of each principle in real code. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/kiss-dry-soc-and-yagni-the-only-4-software-principles-you-actually-need-vuqtrjfce) ```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":"KISS, DRY, SoC, and YAGNI: The Only 4 Software Principles You Actually Need","url":"https://daily.dev/posts/kiss-dry-soc-and-yagni-the-only-4-software-principles-you-actually-need-vuqtrjfce","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/kiss-dry-soc-and-yagni-the-only-4-software-principles-you-actually-need-vuqtrjfce"},"datePublished":"2026-09-03T03:47:50.176Z","dateModified":"2026-09-04T00:00:19.114Z","description":"A walkthrough of four foundational software design principles—KISS, DRY, SoC, and YAGNI—each explained with before/after code examples in JavaScript. 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