1799404 - Two consecutive accesses to textarea.scrollHeight return different results

Status: RESOLVED DUPLICATE of bug 1787062

(Core :: CSS Parsing and Computation, defect)

Description

[dima.krutoo]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:106.0) Gecko/20100101 Firefox/106.0

Steps to reproduce:

define html markup, CSS styles and JS script like in this code snippet:
https://codepen.io/dimakrutoo/pen/BaVLvvV

Actual results:

Two consecutive accesses to scrollHeight property of textarea return different results

It logs into console

Expected results:

Two consecutive accesses to scrollHeight property of textarea return same result

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::DOM: Core & HTML' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Hsin-Yi Tsai (she/her) [:hsinyi]]

This issue is reproducible on Mac for me. It works as expected on Windows.

Comment 3

[Bartosz Dziewoński]

This issue (or a very similar one) also occurs on Windows, at least on Firefox 108 and 109. Please see https://phabricator.wikimedia.org/T317369 for reproduction steps that work on Windows. (Unfortunately I wasn't able to make a reduced test case yet, and the Codepen given in bug description behaves correctly on my Windows device).

Comment 4

[Gregory Pappas [:gregp]]

7:22.92 INFO: No more integration revisions, bisection finished.
7:22.92 INFO: Last good revision: 3ea7d91368d10e6322bb72f5c1c59c624cb3cd11
7:22.92 INFO: First bad revision: d3176de5dffaa8527ae417ad2e75c21d02b87d62
7:22.92 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=3ea7d91368d10e6322bb72f5c1c59c624cb3cd11&tochange=d3176de5dffaa8527ae417ad2e75c21d02b87d62

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

:emilio, since you are the author of the regressor, bug 1778983, could you take a look?

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