parent-style-relative-units.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/text/parent-style-relative-units.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Canvas test: CanvasTextDrawingStyles.font with canvas relative units</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-font">

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

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

<canvas id="canvas" style="font-size: 30px; line-height: 40px"></canvas>

<script>

  const canvas = document.getElementById("canvas");

  const ctx = canvas.getContext("2d");

  test(() => {

    ctx.font = "2em serif";

    assert_equals(ctx.font, "60px serif");

  }, "Font-size based on canvas element font-size");

  test(() => {

    // Line-height should be forced to normal, but also irrelevant for resolving

    // lh-units for font-size.

    ctx.font = "2lh/100 serif";

    assert_equals(ctx.font, "80px serif");

  }, "Font-size based on canvas element line-height");

</script>