supported-in-source-type.html

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This WPT test may be referenced by the following Test IDs:
- /apng/supported-in-source-type.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Animated PNG MIME type (image/apng) is recognized by &lt;source type></title>

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

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

<script>

function resolveUrl(relativeUrl) {

  var a = document.createElement('a');

  a.href = relativeUrl;

  return a.href;

async_test(t => {

  window.onload = t.step_func_done(() => {

    let image = document.querySelector('img');

    let apngSrc = document.querySelector('source');

    assert_equals(image.currentSrc, resolveUrl(apngSrc.srcset));

});

});

</script>

<picture>

  <source srcset="/images/anim-gr.png" type="image/apng">

  <img src="/images/anim-gr.gif" style="visibility: hidden">

</picture>