Source Map — Your Ultimate Guide

<h2>What are Source Maps</h2> Source maps are files with names ending with .map (for example, example.min.js.map and styles.css.map). They can be generated by most build tools, for example, Vite, webpack, Rollup, Parcel, esbuild, and more. Most of the time, our production javascript code are often transformed in some way from the original sources created by a developer. For example: <ul> <li>Sources are often combined and minified to make delivering them from the server more efficient.</li> <li>JavaScript running in a page is often machine-generated when compiled from a language like TypeScript</li> </ul> In these situations, it’s much easier to debug the original source, rather than the source in the transformed state that the browser has downloaded. That’s where source maps come in. Source maps map from the transformed source to the original source, enabling the browser to reconstruct the original source and present the reconstructed original in the debugger. For example, using build tools, we can transpile and compress the following TypeScript file into a single line of JavaScript. <a href="https://bootcamp.uxdesign.cc/source-map-your-ultimate-guide-f81fc60d2d3">Read More</a>