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<!DOCTYPE html> <html> <body> <p>Click the button to add elements to the beginning of the array.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> var fruits = ["Banana", "Orange", "Apple", "Mango"]; document.getElementById("demo").innerHTML = fruits; function myFunction() { fruits.unshift("Lemon", "Pineapple"); document.getElementById("demo").innerHTML = fruits; } </script> <p><b>Note:</b> The unshift() method does not work properly in Internet Explorer 8 and earlier: the values will be inserted, but the return value will be <em>undefined</em>.</p> </body> </html>