The array.keys() method of JavaScript is used to return an Array Iterator object with the keys of an array.
The syntax is as follows −
array.keys()
Let us now implement the array.keys() method in JavaScript −
Example
<!DOCTYPE html>
<html>
<body>
<h2>Car Variants</h2>
<p id="test"></p>
<script>
var arrStud = ["Crossover", "Convertible", "Hatchback", "SUV"];
var res = arrStud.keys();
for (val of res) {
document.getElementById("test").innerHTML += val + "<br>";
}
</script>
</body>
</html>Output
Example
<!DOCTYPE html>
<html>
<body>
<h2>Ranking Points</h2>
<p>Click the button to display only the keys</p>
<button onclick="display()">Result</button>
<p id="test"></p>
<script>
var pointsArr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 1000];
document.getElementById("test").innerHTML = pointsArr;
function display() {
var res = pointsArr.keys();
for (val of res) {
document.getElementById("test").innerHTML += val + "<br>";
}
}
</script>
</body>
</html>Output
Above, click the “Result” button −
