The file is a specialized "source map" that bridges the gap between compressed, production-ready code and human-readable source code. While the .min.js file is what your website actually runs, the .min.map file is a developer-only asset used for debugging. What is jquery.min.map?
When you download the minified version of jQuery ( jquery.min.js ), the code has been stripped of whitespace and comments, and variable names have been shortened to save bandwidth. This makes the file significantly faster to load but nearly impossible for a human to read or debug. jquery.min.map download
A (the .map file) contains a JSON object that maps every character in the minified version back to its original location in the uncompressed jquery.js file. This allows your browser's developer tools to reconstruct the original code during a debugging session, even though the server only delivered the minified version to the user. Why using jquery map? - javascript - Stack Overflow The file is a specialized "source map" that