Elment.attributes does not implement the NamedNodeMap interface

I was trying to replace JSDOM with Happy DOM and the app was failing to run something akin to:

const element = document.createElement('div');
const someAttribute = document.createAttribute('someattribute');
element.attributes.setNamedItem(someAttribute);

I see the current implementation is:

readonly attributes: { [k: string]: Attr | number };

Is there any chance there will be a switch to NamedNodeMap in the future?

[matt-smarsh]

This issue seems to be the last one preventing a drop-in replacement from jsdom. I’m using vitest & @vue/test-utils@1 and I can’t switch because of the error TypeError: attributes.item is not a function which is thrown from within @vue/test-utils and is unavoidable.

[capricorn86]

Thank you contributing @jledentu! 🙂

There is a fix in now.

You can read more about the release here: https://github.com/capricorn86/happy-dom/releases/tag/v7.6.0