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LibWeb: Implement a slow but functional HTMLCollection :^)

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HTMLCollection is an awkward legacy interface from the DOM spec.

It provides a live view of a DOM subtree, with some kind of filtering
that determines which elements are part of the collection.

We now return HTMLCollection objects from these APIs:

- getElementsByClassName()
- getElementsByName()
- getElementsByTagName()

This initial implementation does not do any kind of caching, since that
is quite a tricky problem, and there will be plenty of time for tricky
problems later on when the engine is more mature.
This commit is contained in:
Andreas Kling 2021-04-22 21:11:20 +02:00
parent 49f3d88baf
commit e4df1b223f
14 changed files with 207 additions and 55 deletions
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6
Userland/Libraries/LibWeb/DOM/Document.idl
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@ -14,9 +14,9 @@ interface Document : Node {
attribute DOMString cookie;
Element? getElementById(DOMString id);
ArrayFromVector getElementsByName(DOMString name);
ArrayFromVector getElementsByTagName(DOMString tagName);
ArrayFromVector getElementsByClassName(DOMString className);
HTMLCollection getElementsByName(DOMString name);
HTMLCollection getElementsByTagName(DOMString tagName);
HTMLCollection getElementsByClassName(DOMString className);
Element createElement(DOMString tagName);
Element createElementNS(DOMString? namespace, DOMString qualifiedName);