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/HTTP

SourceMap

The SourceMap HTTP response header links generated code to a source map, enabling the browser to reconstruct the original source and present the reconstructed original in the debugger.

Syntax

SourceMap: <url>
X-SourceMap: <url> (deprecated)

Directives

<url>
A relative (to the request URL) or absolute URL pointing to a source map file.

Examples

SourceMap: /path/to/file.js.map

Specifications

Specification Title
Draft document Source Map Revision 3 Proposal

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
SourceMap Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
≤79
≤79
≤79
Prefixed
Prefixed Implemented with the vendor prefix: X-
55
55
27
Prefixed
Prefixed Implemented with the vendor prefix: X-
? Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
SourceMap Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
55
55
27
Prefixed
Prefixed Implemented with the vendor prefix: X-
Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-
Yes
Yes
Yes
Prefixed
Prefixed Implemented with the vendor prefix: X-

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/SourceMap