Hi Emilio. I'm concerned that this change in behaviour will cause subtle bugs in existing or future code we write. In my mind and I'm sure in the minds of many developers, `ownerGlobal` means the window the element is in and that will be a hard perception to shift. Because it will now mean something different only in rare cases we are likely to use the wrong thing without noticing. Additionally the naming of `ownerGlobal` and `ownerDocGlobal` makes it very unclear that they mean different things.
Since `ownerGlobal` is not part of the web spec can we keep the same behaviour for `ownerGlobal` and introduce a new property for the node's original window? On Thu, 16 Apr 2026 at 23:22, 'Emilio Cobos Álvarez' via [email protected] <[email protected]> wrote: > Hey, > > Once I get bug 1470017 <https://bugzil.la/1470017> to stick, the > `EventTarget.ownerGlobal` property on nodes will change behavior slightly. > > This will allow fixing long-standing web components issues (prototypes > getting lost on adopt) and some other subtler webcompat issues, like bug > 2022763 <https://bugzil.la/2022763>. > > In most cases it should be fine to keep using it in the front-end, but > there are two subtle behavior changes that might need code to be adjusted: > > - If you're dealing with nodes that might have been adopted, > `ownerGlobal` might point to the original window of the node, not the one > that's currently in. > - .ownerGlobal might also now return non-null a bit more often (after > the docshell is gone). > > If you need the old behavior, you can use the new `Node.ownerDocGlobal` > property. I don't expect much fallout, and I want to proactively change > some more code to use `ownerDocGlobal` (e.g. child actors almost always > want to look at the window the node is in), but I thought it might be worth > a PSA, reach out if you see issues that might be caused by it on the chrome. > > Let me know if there are any questions. > > Thanks, > -- Emilio > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/a/mozilla.org/d/msgid/firefox-dev/CAFhp-qcR_%3Dc-QMRqFPYVyK1v3p67ViNaeLRr1emN%3DaXJRs7jBg%40mail.gmail.com > <https://groups.google.com/a/mozilla.org/d/msgid/firefox-dev/CAFhp-qcR_%3Dc-QMRqFPYVyK1v3p67ViNaeLRr1emN%3DaXJRs7jBg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAPMxTNro1teC1nsC2WaUAPWZFvTOv8ei%2B_T%3D%3D%2ButG5-WyxOkyQ%40mail.gmail.com.
