Jquery selector gets ID instance sharing through class name

This article mainly shares with you the Jquery selector to obtain ID instances through class names. I hope it can help everyone.

Get by class name

To search by class, please add a . before the class name:

var a = $('.red'); // 所有节点包含 `class="red"` 都将返回
// 例如:
// <p class="red">...</p>
// <p class="green red">...</p>

Find objects that contain multiple class names at the same time, such as "car" ” and “ bus”

var a = $('.car.bus'); // 注意没有空格！
// 符合条件的节点：
// <p class="car bus">...</p>
// <p class="blue bus car">...</p>

Get the ID of p through p’s class name

Sometimes we only know that p’s class name contains one of the names and want to get its id.

$(".tab-pane.active").attr("id")
// 符合条件的结果：
one
// <p class="tab-pane bus active" id="one">...</p>

Get the class of p through the ID name of p

$(".tab-pane.active").attr("id")
$("p #hrefMenu0").attr("class")
// 符合条件的结果：
tab-pane bus active
// <p class="tab-pane bus active" id="hrefMenu0">...</p>

Get the ID of the subset node under p through the class name of p

$(".tab-pane.active").children().attr("id")// 获取到以下两个id:content，page<p class="tab-pane active">
      <p id="content"></p>
      <ul id="page"></ul>
</p>

Get the class name of p Get the ID of the peer node under the p

$(".tab-pane.active").next().attr("id")// 获取到以下id:content<p class="tab-pane active">
</p>
 <p id="content"></p>

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