Quick Fix: Review if the associated sourcemap file (.map) is available. If not, upload it to the site or remove the last line from the file.
The Problem:
A website is encountering a source map error, specifically an HTTP 404 error when attempting to retrieve the bootstrap.min.css.map file. The error message indicates that the request for the source map URL failed with a 404 status code. This suggests that the source map file is not available at the specified location. The developer has verified that the bootstrap.min.css file can be accessed directly, but the source map file is inaccessible. The task is to determine the cause of the 404 error and provide a solution to fix it.
The Solutions:
Solution 1: Resolve Sourcemap File Issue
The error message indicates that the CSS source map file (.css.map) associated with bootstrap.min.css could not be found. Source maps are optional files that provide information about the original, unminified code, enabling easier debugging. However, they are not essential for the CSS to function.
To resolve this issue, you can:
Exclude the source map file: Remove the last line from the bootstrap.min.css file that references the source map. This will prevent the browser from attempting to load the missing file.
Include the source map file: Make sure the source map file is present and accessible at the specified URL. Verify that the file exists and has the correct permissions.
Q&A
What is the cause of the error?
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The error is caused by the absence of the sourcemap (.map file) associated with the .js or .css resource.
How to fix the error?
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You can find a way to include the file in the site or remove the last line from the file.
Video Explanation:
The following video, titled "How to fix 'DevTools failed to load SourceMap' 'status code 404, net ...", provides additional insights and in-depth exploration related to the topics discussed in this post.
How to fix 'DevTools failed to load SourceMap' 'status code 404, net::ERR_UNKNOWN_URL_SCHEME' issue.
