Fetch doesn’t support custom parameters

[lmaddio]

I'm trying to fetch code from a third party library but I realised I can’t send a custom header.

fetch(config.domURL).then((response) => response.text()),
fetch(config.authorURL).then((response) => response.text()),

Could this be considered to be added in the future?

Also as a question, when I try to load a script from another domain it doesn’t execute and I assuming it has to do with a security policy.
As the sec-fetch-dest is being set as empty.
Do you know if this is related to be using fetch inside workers?

[samouri]

Have you tried passing headers in to the fetch call?

Something like:

fetch(someUrl, { 
  headers: {
      'Content-Type': 'application/json'
  }
)

[lmaddio]

@samouri yes, I tried and sec-fetch-dest remains empty.
Even the request is placed as XHR, not allowing the content to be executed.
Could you confirm if this happens to you as well?