Why Doesn't `` Support Flexbox Layout in Modern Browsers?

Why Doesn't

Support Flex Layout?

In CSS, the

element is treated as a special case when it comes to flex layout. Despite efforts to style it with display: flex or display: inline-flex, it behaves like a block or inline-block element, respectively.

This behavior confounds some developers who observe unexpected results in browsers like Firefox and Chrome, but find it bafflingly working in Internet Explorer. Is this a bug or intended behavior?

The Explanation

According to bug reports (Bug 984869 and Bug 1047590),

—along with and —has special rendering behavior. Browsers like Chrome and Firefox don't implement these elements purely in CSS, making them behave like black boxes from the perspective of CSS.

This means they don't always react as other non-special element types, such as

. For example, scrollbars won't appear on a with overflow: scroll, nor will it be rendered as a table with display: table.

Similarly, for

, the flex display mode is disregarded. This behavior aligns with Internet Explorer, which refuses to apply flex layout to

as well.

The Solution

To reliably achieve a specific layout within a

cross-browser, the most effective solution is to utilize a wrapper

within the

itself. This approach is similar to what is necessary for

and

within other browsers.

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