Why Don't Input and Button Elements Always Behave as Expected in Flex Containers?

Flex Container Issue with Input and Button Elements

Input and button elements within a flex container may not respond as expected to flex properties. This is due to the inherent behavior of input elements, which have default width settings.

Default Width of Input Elements

Unlike div elements, which start with no intrinsic width, input elements are assigned a default width by browsers. This width can prevent flex properties from taking effect properly.

Illustration of Default Width

The following image demonstrates the default width of an input element:

[Image of an input element with blue borders, showing the default width]

As seen in the image, the browser automatically gives the input a width, preventing it from shrinking or growing as expected within the flex container.

Solution: Overriding Default Width

To resolve this issue, override the default width of the input element using CSS:

input {
  width: 100%;
  flex: 1;
}

This will allow the input element to shrink or grow within the flex container as intended.

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