طول unshift()
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<!DOCTYPE html> <html> <body> <h2>JavaScript Array Methods</h2> <h2>unshift()</h2> <p>The unshift() method returns the length of the new array:</p> <p id="demo1"></p> <p id="demo2"></p> <p id="demo3"></p> <script> var fruits = ["Banana", "Orange", "Apple", "Mango"]; document.getElementById("demo1").innerHTML = fruits; document.getElementById("demo2").innerHTML = fruits.unshift("Lemon"); document.getElementById("demo3").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>