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 −