transformRequest is overwritten by defaults for Accept headers
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Description
**mapbox-gl-js version**:
2.8.1
**browser**:
Firefox
### Steps to Trigger Behavior
1. add a transformRequest the sets the "accept" header
2. load the page
3. header isn't set. Other custom headers are set properly, but Accept: is overwritten by the default application/json value
### Expected Behavior
Use the header I explicitly add (I need application/vnd.pgrst.object+json to get data from PostgREST)
### Actual Behavior
Default value is always used.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Search the TypeScript source for the transformRequest handling and the default Accept header, then reproduce the reported behavior in Firefox using a custom application/vnd.pgrst.object+json value. Done means an explicitly supplied Accept header is preserved while other request headers continue to work.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- frontend, networking
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100