textarea-placeholder-lineheight.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/forms/the-textarea-element/textarea-placeholder-lineheight.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

  <title>textarea placeholder line-height</title>

  <link rel="author" title="Daniel Libby" href="mailto:dlibby@microsoft.com">

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

  <style>

    textarea {

      margin: 0;

      border: 0;

      padding: 0;

  </style>

</head>

<body>

  <textarea rows=1 placeholder=foo style="border:0"></textarea>

  <script>

    let textarea = document.querySelector('textarea');

    const lineHeight = 19.5;

    textarea.style.lineHeight = lineHeight + "px";

    test(

      function () {

        assert_equals(textarea.getBoundingClientRect().height, lineHeight);

      }, "Bounding rect height for textarea must be the same as line-height");

    test(

      function () {

        assert_equals(getComputedStyle(textarea).lineHeight, lineHeight + "px");

      }, "ComputedStyle line-height for textarea must be the same as set value");

  </script>

</body>

</html>