NEW 229916
ARIAMixin properties should be non-nullable 
https://bugs.webkit.org/show_bug.cgi?id=229916
Summary ARIAMixin properties should be non-nullable
Kagami Sascha Rosylight
Reported 2021-09-04 10:28:52 PDT
Context: https://github.com/w3c/aria/pull/1261 ``` document.body.ariaAtomic // this currently returns null but should always return a string ```
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Radar WebKit Bug Importer
Comment 1 2021-09-04 10:29:08 PDT
<rdar://problem/82759865>
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