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<!doctype html>
<title>Element class test</title>
<div class="a b c">Fail</div>
<script>
(function() {
let div = document.getElementsByClassName("a")[0]
const classes = ["a", "b", "c"];
let cl = div.classList;
for (let i = 0; i < classes.length; ++i) {
if (cl[i] !== classes[i])
return;
}
const classes2 = ["x", "y", "z"];
div.setAttribute("class", classes2.join(' '));
let i = 0;
for (let x of cl) {
if (x != classes2[i])
return;
++i;
}
div.textContent = "Success";
})();
</script>
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