This was originally reported in https://github.com/webcompat/web-bugs/issues/84751 To reproduce: 1) Open the attached test case in Firefox release and observe the block on the right Expected: The panel inside the iframe is fully visible Actual: The width of the panel is around 5px, so only a small part of it is visible The issue only happens when I change the display property of a wrapper element dynamically with a setTimeout and works ok if the element is displayed by default. This is just to illustrate the behaviour - on the original site, it is changed on click. From mozregression: ``` 2:43.09 INFO: Narrowed integration regression window from [98a3f624, a74fee26] (3 builds) to [98a3f624, 58909c79] (2 builds) (~1 steps left) 2:43.09 INFO: No more integration revisions, bisection finished. 2:43.09 INFO: Last good revision: 98a3f624dd0822d471b46703d4cb0c8bafc1674b 2:43.09 INFO: First bad revision: 58909c79343bc9145173cfcd54c277cd343eb2a8 2:43.09 INFO: Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=98a3f624dd0822d471b46703d4cb0c8bafc1674b&tochange=58909c79343bc9145173cfcd54c277cd343eb2a8 ```
Bug 1733475 Comment 0 Edit History
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This was originally reported in https://github.com/webcompat/web-bugs/issues/84751 To reproduce: 1) Open the attached test case [84751.html](https://bug1733475.bmoattachments.org/attachment.cgi?id=9243806) in Firefox release/ Nightly and observe the block on the right Expected: The panel inside the iframe is fully visible Actual: The width of the panel is around 5px, so only a small part of it is visible The issue only happens when I change the display property of a wrapper element dynamically with a setTimeout and works ok if the element is displayed by default. This is just to illustrate the behaviour - on the original site, it is changed on click. From mozregression: ``` 2:43.09 INFO: Narrowed integration regression window from [98a3f624, a74fee26] (3 builds) to [98a3f624, 58909c79] (2 builds) (~1 steps left) 2:43.09 INFO: No more integration revisions, bisection finished. 2:43.09 INFO: Last good revision: 98a3f624dd0822d471b46703d4cb0c8bafc1674b 2:43.09 INFO: First bad revision: 58909c79343bc9145173cfcd54c277cd343eb2a8 2:43.09 INFO: Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=98a3f624dd0822d471b46703d4cb0c8bafc1674b&tochange=58909c79343bc9145173cfcd54c277cd343eb2a8 ```