<!DOCTYPE html>
<!--
 | When the "text-overflow" property is set to "clip" overflowing
 | inline content is clipped and not ellipsed. The content should be
 | aligned to the start edge of the line.
 |   https://www.w3.org/TR/css3-ui/#propdef-text-overflow
 -->
<html>
<head>
  <meta charset="utf-8">
  <style>
    body {
      margin: 0px;
      font-family: Roboto;
      font-size: 20px;
    }
    .containing-block {
      white-space: nowrap;
      width: 200px;
      overflow: hidden;
      text-overflow: clip;
      border: 1px solid #000000;
    }
  </style>
</head>
<body>
  <div class="containing-block">
    <div dir="ltr">This is some long text that will not fit in the box</div>
    <div dir="ltr"><span>This is some long text that will not fit in the box</span></div>
    <div dir="rtl">This is some long text that will not fit in the box</div>
    <div dir="rtl"><span>This is some long text that will not fit in the box</span></div>
  </div>
</body>
</html>