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HTML id 属性


定义和用法

The id 属性为 HTML 元素指定唯一的 ID(该值在 HTML 文档中必须是唯一的)。

The id 属性最常用于指向样式表中的样式,以及通过 JavaScript(通过 HTML DOM)来操作具有特定 ID 的元素。


适用范围

The id 属性是 全局属性,可以在任何 HTML 元素上使用。

元素 属性
所有 HTML 元素 id

示例

示例

使用 id 属性通过 JavaScript 操作文本

<html>
<body>

<h1 id="myHeader">Hello World!</h1>
<button onclick="displayResult()">更改文本</button>

<script>
function displayResult() {
    document.getElementById("myHeader").innerHTML = "Have a nice day!";
}
</script>

</body>
</html>
自己尝试 »

浏览器支持

属性
id

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