textarea-defaults-to-zero-margin.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /html/rendering/replaced-elements/the-textarea-element/textarea-defaults-to-zero-margin.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Test: textarea should default to zero margins</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#the-textarea-element-2">

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1875156">

<link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">

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

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

<body>

  <textarea id="myTextarea"></textarea>

  <script>

test(function() {

  const marginProps = ["margin-top", "margin-right",

                       "margin-bottom", "margin-left"];

  const cs = window.getComputedStyle(myTextarea, "");

  marginProps.forEach((prop)=> {

    assert_equals(cs[prop], "0px",

                  `computed value of '${prop}' should default to "0px"`);

});

}, "HTML textarea should default to having 0px as computed value for all margin properties")

</script>