Why Doesn't `text-overflow: ellipsis` Work in a Flex Container?

Truncating Text with text-overflow in Flex Layout

Implementing text-overflow: ellipsis to truncate text in a flex container often leads to the ellipsis being absent. This becomes apparent when comparing the result with the same code without flexbox.

CSS Code:

.flex-container {
  display: flex;
  text-overflow: ellipsis;
  overflow: hidden;
  text-align: left;
}

HTML Code:

<h1>Flexible Boxes</h1>
<div class="flex-container">

Observed Issue:

The expected result, which should truncate the text to "ThisIsASam...", is not achieved. Instead, the output displays "ThisIsASamp ".

Cause:

The issue arises because the text-overflow property must be applied to the flex children rather than the parent container. This is because the parent container has a single line of text, which doesn't require truncating.

Solution:

To resolve this problem, separate classes should be used for the children to control truncation.

CSS Code:

.flex-child {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

This approach ensures that the flex children have the necessary styles for truncating the text while the parent container can still maintain the desired layout.

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