Firefox hides vertical scrollbar if element's height is less than 32px_问答_开发者

Firefox hides vertical scrollbar if element's height is less than 32px

开发者 https://www.devze.com 2022-12-08 07:07 出处：网络

in FF3 (3.0.14) I\'m seeing an issue where the vertical scrollbar is hidden on an element if its height is less than 32px. In my (much simplified) example below, the scrollbar doesn\'t appear on \"sho

相关专题：firefox

in FF3 (3.0.14) I'm seeing an issue where the vertical scrollbar is hidden on an element if its height is less than 32px. In my (much simplified) example below, the scrollbar doesn't appear on "shouldScroll" - even though its child is larger than it - until I increa开发者_运维技巧se its height. Does anyone know if this is a known issue with particular versions of FF, and/or if any workarounds exist?

Cheers, Alasdair

P.S. sorry about the formatting, if someone could tell me how best to embed html in my post it'd be much appreciated

<html>
<head>
</head>
<body>
<div id="shouldScroll" style="height: 20px; overflow: auto; background-color: red">
<div id="child" class="popupText" style="width: 100px; height: 100px;">Run Test</div>
</div>
</body>
</html>

I'm not a web developer but noticed 32 which is something of a magic number when dealing with images. The two buttons on the scrollbar are likely 16 pixels tall. I imagine Firefox is hiding the scroll bar when the client area size is less than the size of the two buttons.

Sorry, no idea about how to fix your actual problem.

Known bug (https://bugzilla.mozilla.org/show_bug.cgi?id=292284, Atoms is right it's done when the scroll buttons don't fit), and I'm not aware of any workarounds.

Trevor's answer is right. To see the scrollbar, just add some height to the outer div.