Source code
Revision control
Copy as Markdown
Other Tools
<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS test reference</title>
<style>
div { white-space: pre; }
span {
background: blue;
/* to make the span go under the right border */
z-index:-1;
position: relative;
}
aside {
display: inline-block;
width: 0.5em;
border-right: 1em white solid;
}
</style>
<p>Test passes if the characters below are arranged in a square and if there is a blue rectangle at the end of the first line.
<div>ああ<aside><span>　</span></aside><br>ああ</div>