--- title: Building a Web Component: : A Step-by-Step Guide | daily.dev description: A step-by-step walkthrough for building a reusable `<counter-button>` Web Component from scratch using native browser APIs. Covers registering a Custom... canonical: https://daily.dev/posts/building-a-web-component-a-step-by-step-guide-ks6l2hqlq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Building a Web Component: : A Step-by-Step Guide | daily.dev og:description: A step-by-step walkthrough for building a reusable `<counter-button>` Web Component from scratch using native browser APIs. Covers registering a Custom... og:url: https://daily.dev/posts/building-a-web-component-a-step-by-step-guide-ks6l2hqlq og:image: https://api.daily.dev/og/posts/ks6l2HQLq.png og:image:alt: Building a Web Component: : A Step-by-Step Guide 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. # Building a Web Component: : A Step-by-Step Guide **[Medium](https://daily.dev/sources/medium_js)** · 10 min read · 1 upvotes · 0 comments ## Summary A step-by-step walkthrough for building a reusable `` Web Component from scratch using native browser APIs. Covers registering a Custom Element, encapsulating markup with Shadow DOM, separating render logic, managing internal state, exposing HTML attributes via `observedAttributes`, dispatching Custom Events for parent communication, and bundling the component as an ES Module with esbuild. Ends with a practical example of integrating the packaged component into a Drupal site. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Webapp UI Component Series](https://daily.dev/posts/webapp-ui-component-series-pzewcrtjo) · Towards Dev · 0 upvotes · 0 comments --- Tags: [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript), [#html](https://daily.dev/tags/html), [#web-components](https://daily.dev/tags/web-components) [View this post on daily.dev](https://daily.dev/posts/building-a-web-component-a-step-by-step-guide-ks6l2hqlq) ```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":"Building a Web Component: : A Step-by-Step Guide","url":"https://daily.dev/posts/building-a-web-component-a-step-by-step-guide-ks6l2hqlq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/building-a-web-component-a-step-by-step-guide-ks6l2hqlq"},"datePublished":"2026-07-20T22:07:32.859Z","dateModified":"2026-07-20T22:09:15.389Z","description":"A step-by-step walkthrough for building a reusable `` Web Component from scratch using native browser APIs. 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