="200" style="-webkit-flex: 1 100px;"></div>
  <div data-expected-width="200" data-offset-x="400" style="-webkit-flex: 1 100px;"></div>
</div>

<!-- If there's only one child, we justify-content: flex-start. -->
<div class="flexbox" style="-webkit-justify-content: space-between">
  <div data-expected-width="100" data-offset-x="0" style="-webkit-flex: 1 0 0; max-width: 100px;"></div>
</div>

<div class="flexbox" style="-webkit-justify-content: space-around">
  <div data-expected-width="100" data-offset-x="50