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Fix checking for empty set for getElementsByClassName

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Because empty set with `.all(predicate)` will always return `true`, it
will result in always filtering wrong elements when the classes is empty
set.

Thus, we return earlier with `always_empty` HTMLCollection in the mpety
classes case so that we can avoid filtering on empty sets.
This commit is contained in:
cybai 2023-04-19 18:03:57 +09:00
parent 9acb9cc5cf
commit c77e4e4e69
2 changed files with 6 additions and 10 deletions
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6
components/script/dom/htmlcollection.rs
View file

@ -252,11 +252,17 @@ impl HTMLCollection {
let case_sensitivity = document_from_node(elem)
.quirks_mode()
.classes_and_ids_case_sensitivity();
self.classes
.iter()
.all(|class| elem.has_class(class, case_sensitivity))
}
}
if classes.is_empty() {
return HTMLCollection::always_empty(window, root);
}
let filter = ClassNameFilter { classes: classes };
HTMLCollection::create(window, root, Box::new(filter))
}

10
tests/wpt/metadata/dom/nodes/getElementsByClassName-empty-set.html.ini
View file

@ -1,10 +0,0 @@
[getElementsByClassName-empty-set.html]
[Passing a space to getElementsByClassName should return an empty HTMLCollection]
expected: FAIL
[Passing three spaces to getElementsByClassName should return an empty HTMLCollection]
expected: FAIL
[Passing an empty string to getElementsByClassName should return an empty HTMLCollection]
expected: FAIL