jQuery 选择器输入 [type=text]:nth-child(2) 不工作

Question

I'm unable to use the ids or the class names associated with the inputs due to how they're randomly generated on input.

The render looks like this:

<div class='dateSearch'>
  <label>Label 1</label>
  <input type='text' id='random_id_1'/>
  <span>Icon</span>
  <input type='text' id='random_id_2'/>
  <span>Icon</span>
  <input type='button' id='searchBtn'/>
</div>

I have no control of the render and can not change any content. So instead I was trying to grab the second text input and add a label before it.

<script>
  $('<label>Label 2</label>').insertBefore('.dateSearch input[type=text]:nth-child(2)')
</script>

.dateSearch input[type=text] will add the label infront of both text inputs, but :nth-child(2) doesn't seem to want to work.

I've tried .dateSearch > input:nth-child(2) and that failed to work as well. I just wanted to add a label before the second input element.

 $('<label>Label 2</label>').insertBefore('.dateSearch input[type=text]:nth-child(2)')

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous"> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script> <div class='dateSearch'> <label>Label 1</label> <input type='text' id='random_id_1'/> <span>Icon</span> <input type='text' id='random_id_2'/> <span>Icon</span> <button type="button" class="btn btn-secondary">Search</button> </div>

Want it to look like this:

Label_1 [ Input Text ] ( Icon ) Label_2 [ Input Text ] ( Icon ) [ Button ]

Answer 1

Are you familiar with eq() ? That gets you around the child selector problem because you can target elements by type as well.

Don't forget to put a for attribute on the label for accessibility if you can.

 const secondInput = $('.dateSearch input[type=text]').eq(1); // zero-based const secondInputId = secondInput.attr('id'); // optional, but wise const label = $('<label>Label 2</label>'); label.attr('for', secondInputId); // optional, but wise label.insertBefore(secondInput);

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <div class='dateSearch'> <label>Label 1</label> <input type='text' id='random_id_1' /> <span>Icon</span> <input type='text' id='random_id_2' /> <span>Icon</span> <button type="button" class="btn btn-secondary">Search</button> </div>