3、 通过 getElementById() 可获取具有指定 ID 的首个元素的引用;getElementsByName() 返回文档中所有具有指定名称的元素集合;而 getElementsByTagName() 则返回所有拥有特定标签名的元素组成的集合。这些方法常用于网页中查找和操作 DOM 元素,是 JavaScript 操作页面内容的 ...
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