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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
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