使用Javascript从HTML提取URL并在函数中使用它 [英] Extract URL from HTML using Javascript and use it in a function

问题描述

我需要从html中提取URL link.

I need to extract URL link from html.

<a rel="nofollow" href="link" class="1">

整个页面上只有一个这样的链接.

There is only one such link on the whole page.

然后我需要在此函数中添加将其用作a.href:

Then I need to add use it as a.href in this function:

function changespan() {
    var spans = document.querySelectorAll('span.image');
    for (var i = spans.length; i--; ) {
        var a = document.createElement('a');
        a.href = "http://domain.com";
        spans[i].appendChild(a).appendChild(a.previousSibling);
    }
}

推荐答案

尝试一下:

function changespan() {
    var spans = document.querySelectorAll('span.image'),
        href = document.querySelector('.nofollow-link').href;
    for (var i = spans.length; i--; ) {
        var a = document.createElement('a');
        a.href = href;
        spans[i].appendChild(a).appendChild(a.previousSibling);
    }
}

但是将您的链接类更改为其他内容，然后1它不能以数字开头:

but change you link class to something else then 1 it can't start with number:

<a rel="nofollow" href="link" class="nofollow-link">Link</a>

http://jsfiddle.net/Tqv76/2/

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