docs: clarify MIME type changes when migrating from Express 4 to 5 #1903
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bjohansebas
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May 15, 2025
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@bjohansebas I have added it back |
bjohansebas
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May 17, 2025
bjohansebas
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@bjohansebas I have done the changes you asked me to do. |
bjohansebas
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May 24, 2025
ShubhamOulkar
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This PR improves the Express 5 migration guide by documenting an important change in MIME type handling that affects users migrating from Express 4 to Express 5.
Issue #1880
When migrating from Express 4 to Express 5, we discovered that JavaScript files served via
res.sendFile()now return a Content-Type of "text/javascript" instead of the previous "application/javascript". This change occurs because Express 5 switched from its internal MIME type handling to themime-typespackage.Changes
express.static.mimesection explaining that this change affects other methods likeres.sendFile()res.sendfile()section warning about potential Content-Type differencesThese documentation improvements will help users understand and prepare for potential MIME type differences when upgrading to Express 5, even if they weren't directly using
express.static.mime.Developer's Certificate of Origin 1.1 is acknowledged and agreed to.