imagedecoder.https.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:
- /jpegxl/imagedecoder.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>JPEG XL integration: ImageDecoder API</title>

<link rel="help" href="https://github.com/web-platform-tests/interop-jpegxl">

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

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

<script>

promise_test(async () => {

  assert_true('ImageDecoder' in self, 'ImageDecoder should exist');

  const supported = await ImageDecoder.isTypeSupported('image/jxl');

  assert_true(supported, 'image/jxl should be supported');

  const response = await fetch('resources/3x3_srgb_lossless.jxl');

  const decoder = new ImageDecoder({data: response.body, type: 'image/jxl'});

  await decoder.tracks.ready;

  const result = await decoder.decode();

  assert_equals(result.image.displayWidth, 3);

  assert_equals(result.image.displayHeight, 3);

  result.image.close();

  decoder.close();

}, 'ImageDecoder decodes JPEG XL image stream.');

</script>