Detailed explanation of jQuery’s prev() usage

This time I will bring you a detailed explanation of the use of jQuery's prev(). What are the precautions for using jQuery's prev()? The following is a practical case, let's take a look.

prev() function is used to match the previous sibling element of the element set. Only the previous sibling element is selected, and its child elements will be ignored. Here I will introduce to you the simple operation of prev() in jQuery. The specific content is as follows:

A friend gave me a request: click the button to delete the input. If there is only one input left, click the button to delete all inputs.

It's a very simple operation, but if you don't know that there is a prev() method in jquery, you may take a lot of detours.

<p>
  <input type="text" placeholder="用户名">
  <input type="text" placeholder="用户名">
  <input type="text" type="hidden">
  <input type="text" type="hidden">
  <a class="reduce" onclick="less()">—</a>
 </p>

css

.reduce{
   display: inline-block;
   color: white;
   text-align: center;
   width: 30px;
   height: 30px;
   background: red;
   line-height: 30px;
   cursor: pointer;
  }
  input{
   height: 18px;
   padding: 5px 10px;
  }

JS

<script src="jquery-1.7.2.min.js"></script>
<script>
 var Reduce = document.getElementsByClassName("reduce");
 var Inp = document.getElementsByTagName("input");
 function less(){
    //查找元素的上一个元素 并移除
  $(".reduce").prev().remove();
  if(Inp.length < 1){
   $(".reduce").remove()
  }
 }
 $(".reduce")
</script>

What I wrote here is mixed and non-standard, just a chestnut, the emphasis is on understanding.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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