JavaScript highlighting can break when the nullish coalescing operator is used

Issue Summary

When using a nullish coalescing operator in JavaScript code, syntax highlighting can break.

Steps to Reproduce

Have a nullish coalescing operator in your code, e.g.

const BAR = 'bar'
const foobar = `${foo ?? 'vf'}`;
// after the nullish coalescing operator the highlighting breaks

Expected Results

Highlighting doesn't break

Actual Results

Highlighting breaks

This has been fixed in CodeMirror and should be released in its next release (5.58).

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available.