Bug: Various return types in NamedNodeMap in lib.dom.d.ts are slightly inaccurate

[dsifford]

It's my understanding that getNamedItem, getNamedItemNS, and item should return null if the Attr node is undefined or out of range.

Additionally, it's my understanding that the return value of the indexed properties should be undefined if out of range.

Sources:

"The NamedNodeMap.getNamedItem() method returns the Attr corresponding to the given name, or null if there is no corresponding attribute." [Via MDN]

"NamedNodeMap.item() returns the Attr at the given index, or null if the index is higher or equal to the number of nodes." [Via MDN]

https://github.com/Microsoft/TypeScript/blob/d7b3b6c77d45adc4542c882a3f19d2f0fdb3e76c/lib/lib.dom.d.ts#L8187-L8197

Let me know if I'm mistaken. I'm always up to learn! 😄

Thanks in advance team for all your hard work!

[dsifford]

Whoops.. Dupe of #17695!

Happy to send in a PR if needed.

[mhegazy]

PRs welcomed.

[dsifford]

@mhegazy Great! I'll keep an eye on this and get to it in the next couple of days if it hasn't been taken care of yet. Thanks!

[mhegazy]

Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.