html运行实例（eg_js_array_unshift）-搜寻教程库

代码示例：（标识：eg_js_array_unshift）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组方法</h1> 

<h2>unshift()</h2>

<p>unshift() 方法将新元素添加到数组的开头。</p>

<button onclick="myFunction()">试一试</button>

<p id="demo"></p>

<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits;

function myFunction() {
  fruits.unshift("Lemon");
  document.getElementById("demo").innerHTML = fruits;
}
</script>

</body>
</html>