问题描述
我有一些HTML
<h4 id="start-here">title</h4>
<p>paragraph</p>
<p>paragraph</p>
...some number of paragraphs...
<a href="#" class="link">link</a>
我有< h4>
在JavaScript中选择了id。我如何从JS中的选择中获得第一个< a>
哪个属于类链接,或者只是下一个兄弟锚标记?
And I've got the <h4>
with the id selected in JavaScript. How do I get from that selection in JS to the first <a>
which is of the class link, or just the next sibling anchor tag?
推荐答案
使用和CSS选择器,此处带有 〜
,你可以这样做:
Using document.querySelector()
and a CSS selector, here with the general sibling combinator ~
, you can achieve that like this:
附注,在下面的示例中我以内联样式为目标,但通常更好地切换类。
Stack snippet
Stack snippet
(function(){
document.querySelector('#stat-here ~ a.link').style.color = 'red';
})();
<h4 id="stat-here">title</h4>
<p>paragraph</p>
<a href="#">link</a>
<p>paragraph</p>
<a href="#" class="link">link</a>
根据其他问题/评论更新,如何获得多个元素作为回报。
Updated based on another question/comment, how to get more than one element in return.
使用可以做类似的事情,并针对这样的多个元素。
With document.querySelectorAll()
one can do similar, and target multiple elements like this.
Stack snippet
Stack snippet
(function(){
var elements = document.querySelectorAll('#div2, #div3');
for (var i = 0; i < elements.length; i++) {
elements[i].style.color = 'red';
}
})();
<h4 id="stat-here1">title</h4>
<div id="div1">some text</div>
<h4 id="stat-here2">title</h4>
<div id="div2">some text</div>
<h4 id="stat-here3">title</h4>
<div id="div3">some text</div>
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