--- title: Project Prototype Series | daily.dev description: A walkthrough of building a signature pad web component using vanilla JavaScript and SVG. Two versions are presented: Version 0 captures a single stroke using... canonical: https://daily.dev/posts/project-prototype-series-q9bbumfiw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Project Prototype Series | daily.dev og:description: A walkthrough of building a signature pad web component using vanilla JavaScript and SVG. Two versions are presented: Version 0 captures a single stroke using... og:url: https://daily.dev/posts/project-prototype-series-q9bbumfiw og:image: https://api.daily.dev/og/posts/Q9BBUMFiw.png og:image:alt: Project Prototype Series 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. # Project Prototype Series **[Medium](https://daily.dev/sources/medium_js)** · 4 min read · 0 upvotes · 0 comments ## Summary A walkthrough of building a signature pad web component using vanilla JavaScript and SVG. Two versions are presented: Version 0 captures a single stroke using pointer events (pointerdown, pointermove, pointerup) and renders it as an SVG background image via a data URI. Version 1 extends this to support multiple strokes by appending nested div elements for each stroke. The post notes a limitation where the data URI of the last div element cannot be saved, meaning the signature cannot be exported. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How to Build a Browser-Based PDF Signature Tool Using JavaScript](https://daily.dev/posts/how-to-build-a-browser-based-pdf-signature-tool-using-javascript-wshgums5w) · freeCodeCamp · 4 upvotes · 1 comments - [JavaScript PDF Signature Block: Add and Customize Signatures in PDFs](https://daily.dev/posts/javascript-pdf-signature-block-add-and-customize-signatures-in-pdfs-osa3eaaxi) · Syncfusion · 3 upvotes · 0 comments - [Project Prototype Series](https://daily.dev/posts/project-prototype-series-zk3si2chc) · Medium · 0 upvotes · 0 comments --- Tags: [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript), [#svg](https://daily.dev/tags/svg), [#web-components](https://daily.dev/tags/web-components) [View this post on daily.dev](https://daily.dev/posts/project-prototype-series-q9bbumfiw) ```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":"Project Prototype Series","url":"https://daily.dev/posts/project-prototype-series-q9bbumfiw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/project-prototype-series-q9bbumfiw"},"datePublished":"2026-07-20T20:07:40.367Z","dateModified":"2026-07-20T20:08:09.478Z","description":"A walkthrough of building a signature pad web component using vanilla JavaScript and SVG. 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