1623078 - [wpt-sync] Sync PR 22299 - Test if CORS-enable module workers can be instantiated

Status: RESOLVED INVALID

(Core :: DOM: Workers, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 22299 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/22299
Details from upstream follow.

Surma <[e-mail]> wrote:

Test if CORS-enable module workers can be instantiated

The spec reads:

Note that such module-based workers follow different restrictions regarding cross-origin content, compared to classic workers. Unlike classic workers, module workers can be instantiated using a cross-origin script, as long as that script is exposed using the CORS protocol. Additionally, the importScripts() method will automatically fail inside module workers; the JavaScript import statement is generally a better choice.

AFAICT, there was no test for this and Chrome is currently not spec compliant in that it throws when you try to instantiate a module Worker with a cross-origin script. (Bug to be filed.)

(cc @jakearchibald @developit)