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 id="Flexible-Boxes">Flexible Boxes</h1>
<div class="flex-container">
<p><strong>Observed Issue:</strong></p>
<p>The expected result, which should truncate the text to "ThisIsASam...", is not achieved. Instead, the output displays "ThisIsASamp ".</p>
<p><strong>Cause:</strong></p>
<p>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.</p>
<p><strong>Solution:</strong></p>
<p>To resolve this problem, separate classes should be used for the children to control truncation.</p>
<p><strong>CSS Code:</strong></p>
<pre class="brush:php;toolbar:false">.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.