addGlobalAttributes style converts style="" to style="0"

[iain-en]

What’s the bug you are facing?

I'm using an extension to add style as a global attribute to a number of Nodes, via addGlobalAttributes.

When an HTML tag with and empty style tag style="" is parsed, it's being rendered as style="0".

<p style="0">test paragraph</p>

Here's a simplified example using just paragraphs:
https://codesandbox.io/s/epic-rubin-21irr?file=/src/App.vue

I can fix this using renderHTML, though I don't quite understand why because I'm just returning null

How can we reproduce the bug on our side?

See my CodeSandbox
https://codesandbox.io/s/epic-rubin-21irr?file=/src/App.vue

Can you provide a CodeSandbox?

https://codesandbox.io/s/epic-rubin-21irr?file=/src/App.vue

What did you expect to happen?

<p style="">test paragraph</p>

Anything to add? (optional)

If there's a better way to enable common HTML tag attributes like style, class, id on every Node type then I'd be happy to hear it

Did you update your dependencies?

• Yes, I’ve updated my dependencies to use the latest version of all packages.

Are you sponsoring us?

• Yes, I’m a sponsor. 💖

[hanspagel]

As a workaround: Try returning '' instead of null.

[iain-en]

@hanspagel - thanks, but this actually works OK:
renderHTML: (attributes) => { return { style: attributes["style"] || null }; }

This doesn't work though:
renderHTML: (attributes) => { return { style: attributes["style"] }; }

Which is strange because attributes["style"] === null when I check