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<!doctype html>
<title>An animation of an attribute ('class') does not change the DOM attribute value</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.animated {
fill: blue;
}
</style>
<svg>
<rect class="base">
<set attributeName="class" to="animated"/>
</rect>
<rect>
<set attributeName="class" to="animated"/>
</rect>
</svg>
<script>
async_test(t => {
onload = t.step_func(() => {
requestAnimationFrame(t.step_func_done(() => {
let rects = document.getElementsByTagName('rect');
assert_true(rects[0].hasAttribute('class'));
assert_equals(rects[0].getAttribute('class'), 'base');
assert_equals(getComputedStyle(rects[0]).getPropertyValue('fill'), 'rgb(0, 0, 255)');
assert_false(rects[1].hasAttribute('class'));
assert_equals(rects[1].getAttribute('class'), null);
assert_equals(getComputedStyle(rects[0]).getPropertyValue('fill'), 'rgb(0, 0, 255)');
}));
});
});
</script>