Why is `overflow-y` not working with nested flexbox in Firefox?
Oct 26, 2024 am 04:28 AM
Firefox overflow-y Not Working with Nested Flexbox
In CSS3 flexbox, an issue arises in Firefox when overflow-y is applied to a nested flex element. This prevents the flex element from scrolling vertically, as seen in this CodePen: http://codepen.io/anon/pen/NPYVga.
Detailed Explanation:
By default, flex items establish a minimum size based on their children's intrinsic size. When an element with overflow: [hidden|scroll|auto] is contained within a flex item, the flex item consistently refuses to shrink smaller than the child's minimum content size.
Solution:
To resolve this issue, assign min-height:0 to the ancestor flex item (.level-0-row2 in the provided code). This disables the default minimum sizing behavior, allowing the flex item to shrink as needed.
Here's a corrected codepen with the fix:
CSS:
.level-0-row2 {
-webkit-box-flex: 1;
-webkit-flex: 1;
-ms-flex: 1;
flex: 1;
border: 1px solid black;
box-sizing: border-box;
display: -webkit-box;
display: -webkit-flex;
display: -ms-flexbox;
display: flex;
-webkit-box-orient: horizontal;
-webkit-box-direction: normal;
-webkit-flex-direction: row;
-ms-flex-direction: row;
flex-direction: row;
min-height: 0;
}
Note:
Chrome does not currently enforce this default minimum sizing behavior, but may incorrectly collapse min-sizes to 0 in specific situations.
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