WHChen-Alex opened a new pull request, #131:
URL: https://github.com/apache/skywalking-client-js/pull/131

   > ### Search before asking
   > * [x]  I had searched in the 
[issues](https://github.com/apache/skywalking/issues?q=is%3Aissue) and found no 
similar issues.
   > 
   > ### Apache SkyWalking Component
   > NodeJS Client Side Agent (apache/skywalking-client-js)
   > 
   > ### What happened
   > Relevant code: 
https://github.com/apache/skywalking-client-js/blob/master/src/trace/interceptors/fetch.ts#L116-L121
   > 
   > <img alt="image" width="368" 
src="https://private-user-images.githubusercontent.com/2338946/342186559-9e6b4596-c107-48f7-a019-c0a828e48a5b.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.uwVZ6lqrOQYGDpWmN5lYy0OAW-hNM9_ofVfGKElA2ug";>
   > If we call fetch with a Request object which contains headers, these 
headers will be throw error if enable skywalking-client-js.
   > 
   > ```js
   > const req = new Request("/api/projects", {
   >   headers: {
   >     "my-custom-header": "test",
   >   },
   > });
   > 
   > fetch(req);
   > ```
   > 
   > ### What you expected to happen
   > Fix error
   > 
   > ### How to reproduce
   > 
https://codesandbox.io/p/devbox/wh2zsm?file=%2Fpackage.json&migrateFrom=sjygtk
   > 
   > Open the devtools, switch to network tab, filter Fetch/XHR, open details 
for the request `/api/projects`, in Request Headers,  and switch to console tab 
, see that  error below
   
![image](https://github.com/user-attachments/assets/a14dd2fe-0aba-408d-b61e-84e64f57ff06)
   
   
![image](https://github.com/user-attachments/assets/fca3b93d-03ec-487d-ba4e-eb090f7780b2)
   
   
   
   > 
   > ### Anything else
   > _No response_
   > 
   > ### Are you willing to submit a pull request to fix on your own?
   > * [x]  Yes I am to submit a pull request on my own!
   > 
   > ### Code of Conduct
   > * [x]  I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   
   


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