testing/web-platform/tests/css/css-pseudo/selection-overlay-and-grammar-001.html


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<!DOCTYPE html>

 <html>

  <meta charset="UTF-8">

  <title>CSS Pseudo-Elements Test: ::selection overlay drawn over the ::grammar-error overlay</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
  <link rel="help" href="https://www.w3.org/TR/css-pseudo-4/#highlight-painting">
  <link rel="match" href="reference/selection-overlay-and-grammar-001-ref.html">

  <meta name="assert" content="In this test, the div::selection pseudo-element must be drawn over the div::grammar-error overlay.">

  <link rel="stylesheet" href="support/highlights.css">
  <style>
  div
    {
      font-size: 60px;
      line-height: 90px;
    }

  div::selection
    {
      background-color: rgba(0%, 50%, 100%, 0.5);
      /*
      a very lite blue color
      according to
      https://www.colorhexa.com/7fbfff
      */
      color: yellow;
    }

  div::grammar-error
    {
      background-color: yellow;
      color: red;
    }
  </style>

  <script src="support/selections.js"></script>

  <p>PREREQUISITE: User agent needs to have an enabled and capable grammar error module. If it does not, then this test does not apply to such user agent.

  <p>Test passes

  <ul>
    <li>if each glyph of the sentence is yellow
    <li>if "thing" has a desaturated lime green background
    <li>if the other words have a very lite blue background and
    <li>if there is no red.
  </ul>

  <!--
    The grammar mistakes in the text below are intentional and part of this test.

    https://html.spec.whatwg.org/multipage/interaction.html#spelling-and-grammar-checking
    • contenteditable makes the text “checkable for the purposes of [spelling and grammar checking]”
    • spellcheck tries to enable spelling and grammar checking (subject to user preferences)
    • lang tries to guide the UA towards checking the text in English (but the UA may ignore this)
  -->
  <div id="test" class="highlight_reftest" contenteditable="true" spellcheck="true" lang="en">Many thing can happen.</div>

  <script>
  const test = document.querySelector("#test");
  selectNodeContents(test);
  trySpellcheck(test);
  </script>