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Bug 1334051 - Part 2: Invoke attributeChangedCallback only if attribute name is in the observed attribute list.

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We call attributeChangedCallback in two cases:

1. When any of the attributes in the observed attribute list has changed, appended, removed, or replaced.

2. When upgrading an element, for each attribute in element's attribute list that is in the observed attribute list.

Note: w/ Fixup for not implementing an API Enhancement Bug 1363481.

Tag UXP Issue #1344
This commit is contained in:
Gaming4JC 2020-01-05 12:13:14 -05:00 • committed by Roy Tam
commit 2bd8be69ea
10 changed files with 222 additions and 71 deletions
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12
testing/web-platform/meta/custom-elements/CustomElementRegistry.html.ini
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@ -6,18 +6,6 @@
[customElements.define must get "observedAttributes" property on the constructor prototype when "attributeChangedCallback" is present]
expected: FAIL
[customElements.define must rethrow an exception thrown while getting observedAttributes on the constructor prototype]
expected: FAIL
[customElements.define must rethrow an exception thrown while converting the value of observedAttributes to sequence<DOMString>]
expected: FAIL
[customElements.define must rethrow an exception thrown while iterating over observedAttributes to sequence<DOMString>]
expected: FAIL
[customElements.define must rethrow an exception thrown while retrieving Symbol.iterator on observedAttributes]
expected: FAIL
[customElements.define must upgrade elements in the shadow-including tree order]
expected: FAIL