computed-style-004.html

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This WPT test may be referenced by the following Test IDs:
- /css/cssom/computed-style-004.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS Test: getComputedStyle - resolved width in nested iframes dynamic width</title>

<link rel="author" title="Rune Lillesveen" href="mailto:futhark@chromium.org" />

<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-values" />

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

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

<iframe id="outer" width="100" scrolling="no" frameborder="0"></iframe>

<script>

  const outerDoc = outer.contentWindow.document;

  outerDoc.open();

  outerDoc.write('<body style="margin:0"><iframe id="inner" scrolling="no" frameborder="0" style="width:100%"></iframe>');

  outerDoc.close();

  const innerWindow = outerDoc.querySelector("#inner").contentWindow;

  const innerDoc = innerWindow.document;

  innerDoc.open();

  innerDoc.write('<body style="margin:0"><div style="width:100%"></div>');

  innerDoc.close();

  innerDoc.body.offsetWidth; // Make sure we layout the top document.

  test(() => {

    assert_equals(innerWindow.getComputedStyle(innerDoc.querySelector("div")).width, "100px");

  }, "Check that the initial width is 100px.");

  test(() => {

    outer.setAttribute("width", "200");

    assert_equals(innerWindow.getComputedStyle(innerDoc.querySelector("div")).width, "200px");

  }, "Check that the resolved width of the inner div is affected by changing the width of outer iframe.");

</script>