The primary origin of TypeScript is derived from the compiled JavaScript and its corresponding source map

Being new to sourcemaps and typescript, I am faced with a project that has been compiled into a single javascript file from multiple typescript files.

The files available to me are:

lib.js (the compiled js code of the project)
lib.js.map (the source map of the lib.js)
lib.d.ts (the "header" of the lib.js before it was compiled)

Upon trying to view the original source files (.ts) in a browser, they appear blank in Chrome. Firefox displays a message stating:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL /path/source/file/file.ts was not found on this server. </p>
</body></html>

I'm hoping for a way to view the original .ts files, as working with the compiled 2MB+ lib.js file is proving to be challenging.

Thank you for any assistance provided!

Answer №1

Ensure that the last line of your generated .js file contains the correct path to your map file. It is important for the path to be relative when using Chrome or Firefox, as an absolute path will result in a 404 error.

Update this line:

//# sourceMappingURL:X;/path/AdvantageClientAD.js.map

To this: //# sourceMappingURL:AdvantageClientAD.js.map

This method works effectively if your TypeScript files are located within the same project as the deployed .js files. However, it may not work if your TypeScript files are stored in a different project.

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