192587 2018-12-11 06:19:01 -0800 stepUp/stepDown throw InvalidStateError when number input is empty 2022-05-30 17:38:30 -0700 1 1 1 Unclassified WebKit Forms Safari 12 Mac macOS 10.14 RESOLVED DUPLICATE 235509 InRadar P2 Normal --- 1 feliziani.emanuele webkit-unassigned cdumez feliziani.emanuele karlcow pascoe rik webkit-bug-importer wenson_hsieh oldest_to_newest 1486913 0 feliziani.emanuele 2018-12-11 06:19:01 -0800 Overview: When an input type=number field is empty, calling stepUp or stepDown on it throws InvalidStateError. Other browsers assume the empty value as 0 and act accordingly. Steps to Reproduce: 1) Open this test page with only the input field and a button to trigger stepUp: https://7zyy3zrq21.codesandbox.io/ (you can access the editor page for quick tweaking here: https://codesandbox.io/s/7zyy3zrq21) 2) Click on the button Actual Result: The input field throws InvalidStateError and the value is not changed Expected Result: The value should be set to 0.01 (assume 0 + step). If a min attribute is set, the value should be set equal to the min attribute. The described behaviour is what happens by clicking on the native UI controls of the input type=number or by using the up/down arrows. Additional Information: The expected result is present in both Chrome and Firefox. 1872814 1 rik 2022-05-30 14:27:54 -0700 I'm not sure when that happened but it seems to be fixed in the Safari Technology Preview 146. 1872822 2 karlcow 2022-05-30 14:58:54 -0700 This might have been fixed by https://bugs.webkit.org/show_bug.cgi?id=235509 1872823 3 webkit-bug-importer 2022-05-30 14:59:02 -0700 <rdar://problem/94123026> 1872847 4 pascoe 2022-05-30 17:38:30 -0700 *** This bug has been marked as a duplicate of bug 235509 ***