SourceMap
Response headers
Points at the map that leads back to the original, unbundled source.
| On the wire | SourceMap: … |
|---|---|
| Category | Response headers |
Headers the server attaches when it answers.
How to read this
- The first digit of a status code carries the meaning: 4 means the request, 5 means the server.
- 404 means "not there"; 403 means "there, but not for you". Swapping them makes debugging slower.
- Header names are case-insensitive — Content-Type and content-type are the same header.
- Caching and CORS problems usually come down to one header line, visible in the browser’s network tab.
Frequently asked questions
Q. What does HTTP SourceMap mean?
Points at the map that leads back to the original, unbundled source.
Q. What does SourceMap look like on the wire?
It travels as SourceMap: …
Q. Where does SourceMap appear?
In response headers.
Q. What group does SourceMap belong to?
The response headers group; the rest of that group is listed further down.