Untitled

dabblet.css

.a {
  display: flex;
  width: 100%;
  height: 200px;
}

.b {
  background: blue;
  min-width: 100px;
  min-height: 100%;
}

.c {
  background: red;
  width: 100%;
}

dabblet.html

<div class="a">
<div class="b">b</div>
<div class="c">c</div>
</div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split-vertical","fontsize":"80","seethrough":"","prefixfree":"1","page":"all"}