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JavaScript Array.isArray()
The Array.isArray() method of JavaScript is used to determine whether an object is an array or not.
The syntax is as follows −
Array.isArray(ob)
Above, the ob parameter is the object to be tested.
Let us now implement the Array.isArray() method in JavaScript −
Example
<!DOCTYPE html>
<html>
<body>
<h2>Ranking Points</h2>
<p>Is this an array? Click the below button to get the answer...</p>
<button onclick="display()">Result</button>
<p id="test"></p>
<script>
var pointsArr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 1000];
var res = pointsArr.entries();
for (val of res) {
document.getElementById("test").innerHTML += val + "<br>";
}
function display() {
var res = document.getElementById("test");
res.innerHTML = Array.isArray(pointsArr);
}
</script>
</body>
</html>Output
Click the “Result” button above −
Example
<!DOCTYPE html>
<html>
<body>
<h2>Demo Heading</h2>
<p>Is this is an array?</p>
<p id="test"></p>
<script>
var arr = ["Accessories", "Electronics", "Books", "Pet Supplies"];
var res = document.getElementById("test");
res.innerHTML = Array.isArray(arr);
</script>
</body>
</html>Output
Updated on: 17-Dec-2019
150 Views
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