Intent to Deprecate and Remove: document.origin
Philip Jägenstedt
Summary
Deprecate document.origin for 2 release cycles and then remove it. self.origin is the replacement, supported in Chrome, Firefox and Safari already.
Motivation
It's a Blink/WebKit-only API which now has a replacement (self.origin) with wider support, and there's evidence to suggest that web developers have been bitten by this interop problem, see below.
Interoperability and Compatibility Risk
Edge: Not supported, and suggested deprecation/removal
Firefox: Not supported
Safari: Supported, but they also support self.origin.
In the previous intent there was an analysis done, which found 45 potentially legit uses of the attribute. Since then usage has gone up so I did another round on GitHub:
https://github.com/whatwg/dom/issues/410#issuecomment-381586352
Conclusion is that the "uncategorized" bucket is now ~80, and I've tested a few of them without finding breakage. No doubt something will break, but the httparchive dataset queried had ~460k pages, so 80 is ~0.017% of that.
If there is a problem, I'd anticipate it's because of a large web property using document.origin, in which case we can revert and retry after a while.
Alternative implementation suggestion for web developers
Use self.origin (window.origin) it returns the same value.
Usage information from UseCounter
https://www.chromestatus.com/metrics/feature/timeline/popularity/1828
1.5% is a big number, but this counter will be hit by mere access, possibly inflated by mere enumeration of attributes on document, and definitely inflated by usage that won't break at all. See above.
Entry on the feature dashboard
https://www.chromestatus.com/feature/5701042356355072
Requesting approval to remove too?
Yes
Jochen Eisinger
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