Allow supported window attributes to be replacable.
As seen in https://github.com/servo/servo/pull/21045 some Window attributes don't support JavaScript from being able to shadow and replace their values.
This PR adds all other attributes I could find that are supported by servo to be replaceable.
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textarea minLength/maxLength
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textarea minLength/maxLength
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Issue #20593: Implement proper checks in WebGLRenderingContext's getFramebufferAttachmentParameter().
Add missing input checks.
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Let the popstate and hashchange events not bubble
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fix#21063
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add TextLength
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add TextLength in HTMLTextAreaElement
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Implement window.length DOM attribute.
Implements the `window.length` DOM attribute for enumerating frames on the document.
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Allow window.parent attribute to be replaceable by JavaScript.
Permit JS to override the window.parent attribute.
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Update WPT upstream sync metadata.
This is the result of running `./mach update-wpt --upstream` with appropriate credentials.
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Respect the source rectangle when drawing a canvas to another canvas.
This allows us to run the three.js examples without panicking, since they use self-drawing canvases to scroll the FPS graph.
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Implement read methods on FileReaderSync
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Implemented the read methods on the FileReaderSync struct according to https://w3c.github.io/FileAPI/#dfn-FileReaderSync
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improve spec compliance of window.close
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Improve the spec compliance of https://html.spec.whatwg.org/multipage/window-object.html#dom-window-close, mainly by implementing the steps related to [closing a browsing context](https://html.spec.whatwg.org/multipage/window-object.html#close-a-browsing-context)
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Fix for document salvageable state
I noticed a bug where if the document was un-salavageable due to the presence of `beforeunload` listeners, this could be overwritten if there were no listeners for `unload`. This could also have happened if an iframe of the document had no listeners while the parent did.
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move test `dom-element-scroll.html` from mozilla to wpt
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The test `dom-element-scroll.html` was originally landed on #19127.
It was designed for testing `scrollLeft` and `scrollTop`.
It is not only for servo. I thought I put a wrong place at that time. It should not be under `mozilla`. It's better placed under `wpt`.
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