Blank className error

[HenryDavies]

Whitespace-only classNames (e.g. class=" ") are currently added with the pattern ".", causing the following error:

Uncaught DOMException: Failed to execute 'querySelectorAll' on 'Document': '.' is not a valid selector.

Here's the relevant bit of code in match.js:

if (attributeName === 'class') {
  const className = attributeValue.trim().replace(/\s+/g, '.')
  pattern = `.${className}`
}

I see a few potential fixes:

• Still using the blank class as a selector, just keeping it as [class=' '] instead of converting to dot version
• Not using it as a selector - continuing to next attribute
• Only using as a selector if there are no non-blank attributes to use

Happy to put a fix in if helpful, just not sure which is best