document.anchors

概述

anchors属性返回当前文档中的所有锚点元素.

语法

nodeList = document.anchors 

例子

if ( document.anchors.length >= 5 ) {
    dump("dump found too many anchors");
    window.location = "http://www.google.com";
}

下例自动生成一个目录列表,包含了到每个段落的锚点.

<!DOCTYPE HTML>
<html>
<head>
    <script type="text/javascript" charset="utf-8">
    function init() {
        var toc = document.getElementById("toc");
        var i, li, newAnchor;
        for (i = 0; i < document.anchors.length; i++) {
            li = document.createElement("li");
            newAnchor = document.createElement('a');
            newAnchor.href = "#" + document.anchors[i].name;
            newAnchor.innerHTML = document.anchors[i].text;
            li.appendChild(newAnchor);
            toc.appendChild(li);
        }
    }

    </script>
</head>
<body onload="init()">

<h1>Title</h1>
<a name="contents"><h2>Contents</h2></a>
<ul id="toc"></ul>

<a name="plants"><h2>Plants</h2></a>
<ol>
    <li>Apples</li>
    <li>Oranges</li>
    <li>Pears</li>
</ol>

<a name="veggies"><h2>Veggies</h2></a>
<ol>
    <li>Carrots</li>
    <li>Celery</li>
    <li>Beats</li>
</ol>

</body>
</html>

在JSFiddle中查看

备注

由于向后兼容的原因,该属性只返回那些拥有name属性的a元素,而不是那些拥有id属性的a元素.

规范

DOM Level 2 HTML: anchors

文档标签和贡献者

 此页面的贡献者: helloguangxue, teoli, khalid32, ziyunfei
 最后编辑者: helloguangxue,