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<!DOCTYPE html> <html> <body> <h1>JavaScript 数组</h1> <p>Array.unshift() 方法将新项目添加到数组的开头：</p> <p id="demo"></p> <script> const fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.unshift("Lemon", "Pineapple"); document.getElementById("demo").innerHTML = fruits; </script> </body> </html>