How Can I Fix JavaScript MIME Type Errors When Linking to GitHub Files?

Linking External JavaScript Files from GitHub

When linking to external JavaScript files hosted on GitHub, users may encounter errors related to strict MIME type checking. This error occurs when the file's MIME type is not executable, which prevents the browser from running the script.

To address this issue, jsdelivr.net offers a workaround. Here are the steps:

1. GitHub Raw URL Conversion: Convert the GitHub Raw URL as follows:

   • Replace "raw.githubusercontent.com" with "cdn.jsdelivr.net"
   • Insert "/gh/" before the GitHub username
   • Remove the branch name
   • Optionally, specify the desired version using "@version"

2. Example:

   Convert:

   http://raw.githubusercontent.com/<username>/<repo>/<branch>/path/to/file.js

   To:

   http://cdn.jsdelivr.net/gh/<username>/<repo>/path/to/file.js

3. Cache Considerations:

   For production environments, it's recommended to link to a specific tag or commit hash. Linking to "latest" may result in long-term caching, preventing updates when new versions are pushed.

4. Background:

   Strict MIME type checking was implemented by GitHub in 2013 to enforce security standards. This can interfere with the intended usage of raw files as scripts.

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