supported always returns false when in iframe

[msvinth-work]

The supported function seems to have a bug due to "else if" instead of "if" and always return false even when in a first-party iframe.

In line 39 in main/src/supported.mjs

Should properly be

 } 
 if ('showOpenFilePicker' in self) {
    return 'showOpenFilePicker';
 }

instead of

  } else if ('showOpenFilePicker' in self) {
    return 'showOpenFilePicker';
  }

[tomayac]

You’re right, this isn’t working as intended.

I think there’s a return 'showOpenFilePicker(); missing right after

browser-fs-access/src/supported.mjs

Line 35 in b52e7bf

top.location + '';

I’ll properly test this after the weekend.

[tomayac]

My brain was in weekend mode. Your suggestion was correct. I have also simplified this, since it still had artifacts of the previous version of the File System Access API. I have also added the different iframes to the demo. Thanks again for filing this.