<!DOCTYPE html>
<html>
<head>
<title>This tests that we can select flex content when they share the same line.</title>
<style>
.line {
  display: flex;
  color: transparent;
  font-size: 10px;
}

div::selection {
  background-color: green;
}
</style>
</head>
<body>
<div class="line"><div>&nbsp</div><div>&nbsp</div></div>
<script>
  document.execCommand('selectAll', false, null);
</script>
</body>
</html>