update-media.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-img-element/update-media.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>img update media</title>

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

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

<script>

    var t = async_test('set media after src updates selected image');

    var img;

    onload = t.step_func(function() {

        img = document.querySelector('img');

        img.addEventListener('load', t.step_func_done(onImgLoad));

        var source = document.querySelector('source[data-media]');

        source.setAttribute('media', source.getAttribute('data-media'));

});

    function onImgLoad() {

        img.removeEventListener('load', onImgLoad);

        assert_true(img.currentSrc.indexOf(img.getAttribute('data-expect')) > -1);

</script>

<div id="log"></div>

<picture>

    <source srcset="/images/fail.gif" data-media="(max-width: 1px)" />

    <source srcset="/images/smiley.png" />

    <img data-expect="/images/smiley.png">

</picture>