JavaScript 数组方法unshift()使用-在线运行代码案例-大卫编程网

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<!DOCTYPE html>
<html>
<title>JavaScript 数组方法unshift()使用示例 - 基础教程(div.cn)</title>
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<body>
<h1>数组 unshift() Method</h1>
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<p>点击按钮向数组添加三个元素:</p>
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<button onclick="myFunc()">增加</button>
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<p id="result"></p>
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<script>
var fruits = ["Banana", "Mango", "Apple"];
document.getElementById("result").innerHTML = fruits;
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function myFunc() {
   var total = fruits.unshift("Strawberry", "Lychee", "Guava");
   document.getElementById("result").innerHTML = fruits + "<br> Lenght = " + total;
}
</script>
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</body>
</html>