<!-- Learn about this code on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/flex-shrink -->

<p>The width of content is 500px; the flex-basis of the flex items is 120px.</p>
<p>A, B, C have flex-shrink:1 set. D and E have flex-shrink:2 set</p>
<p>The width of D and E is less than the others.</p>
<div id="content">
  <div class="box" style="background-color:red;">A</div>
  <div class="box" style="background-color:lightblue;">B</div>
  <div class="box" style="background-color:yellow;">C</div>
  <div class="box1" style="background-color:brown;">D</div>
  <div class="box1" style="background-color:lightgreen;">E</div>
</div>
#content {
  display: flex;
  width: 500px;
}

#content div {
  flex-basis: 120px;
  border: 3px solid rgba(0,0,0,.2);
}

.box { 
  flex-shrink: 1;
}

.box1 { 
  flex-shrink: 8; 
}

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