Flexbox resize and scrollable overflow [duplicate]

Answer 1

Add min-height: 0 to .flexGrowWrapper - see demo below:

$("button").click(function() {
  $(".resize").toggleClass("small");
});

.resize {
  height: 200px;
  display: flex;
  flex-direction: column;
  overflow-y: hidden;
  width: 300px;
}

.resize.small {
  height: 100px;
}

.heading {
  flex: 0 0 auto;
}

.flexGrowWrapper {
  border: 2px solid red;
  flex-grow: 1;
  min-height: 0; /* ADDED */
}

.wrapper {
  height: 100%;
  overflow-y: auto;
}

.content {
  display: flex;
  flex-direction: row;
  clear: both;
}

<button>
Resize
</button>
<div class="resize">
  <div class="heading">
    <label>Some heading that wont scroll</label>
  </div>
  <div class="flexGrowWrapper">
    <div class="wrapper">
      <div class="content">
        content
      </div>
      <div class="content">
        content
      </div>
      <div class="content">
        content
      </div>
      <div class="content">
        content
      </div>
      <div class="content">
        content
      </div>
      <div class="content">
        content
      </div>
      <div class="content">
        content
      </div>
    </div>
  </div>
</div>
<div>
  Something else here
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

---

Why this works

Note that this is because for a column flexbox the default min-height value is auto (along the flex axis). You can see some examples of this behaviour below:

• Flexbox affects overflow-wrap behavior
• Why don't flex items shrink past content size?