js list 添加元素

在JavaScript中，可以使用`push`方法向数组（list）中添加元素。例如，如果有一个数组`arr`，我们可以使用`arr.push(element)`将元素添加到数组的末尾。下面是一个示例代码：

var arr = ['a', 'b', 'c'];
arr.push('d');
console.log(arr);

输出结果为：["a", "b", "c", "d"]。可以看到，通过`push`方法，成功将元素`d`添加到了数组`arr`的末尾。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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