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<body>
<h1>JavaScript Sets</h1>
<h2>The keys() Method</h2>
<p>The keys() method returns a Set Iterator with all the values from a Set.</p>
<p id="demo"></p>
<script>
// Create a Set
const letters = new Set(["a","b","c"]);
// List all Elements
let text = "";
for (const x of letters.keys()) {
text += x + "<br>";
}
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>