Import maps don't use SystemJS fetch hook

[erikt9]

Import maps should use fetch hook to retrieve script source

The relevant code from import-maps.js:

if (script.type === 'systemjs-importmap') {
      script.sp = true;
      var fetchPromise = script.src ? fetch(script.src, { integrity: script.integrity }).then(function (res) {
        if (!res.ok)
          throw Error(process.env.SYSTEM_PRODUCTION ? res.status : 'Invalid status code: ' + res.status);
        return res.text();

Seems like the fetch here should be using the fetch hook instead of the global method? Would be nice for consistency if all fetches SystemJS performs go through the hook.

[joeldenning]

Agreed, I'll create a pull request to implement this.

[joeldenning]

I've implemented this in #2376

[joeldenning]

Published in https://github.com/systemjs/systemjs/releases/tag/6.12.1