jQuery验证表单输入和使用Bootstrap 4高亮显示标签 [英] JQuery Validate Form Inputs & Highlight Labels with Bootstrap 4

问题描述

我已阅读我已阅读带有jQuery验证插件的Bootstrap 很有帮助，但它是Bootstrap 3，不是 Bootstrap 4.

I have read I have read Bootstrap with jQuery Validation Plugin and it's helpful, but it's Bootstrap 3, not Bootstrap 4..

我正在将 JQuery Validate 与 Bootstrap 4 一起使用，但似乎无法使用在无效时将标签和输入字段变为突出显示红色.

I'm using JQuery Validate with Bootstrap 4, but can't seem to get the label and input field to highlight red when it's invalid.

我认为valid和invalid输入类是BS中的默认类，

I thought the valid and invalid input classes were default in BS, link? Maybe i'm using them incorrectly.

我的代码在下面，这是一个小提琴.

My code is below, here's a fiddle.

HTML

<form id="myform">
  <div class="row">
    <div class="col-xs-12 col-sm-12 col-md-6 col-lg-6">
      <div class="form-group">
        <label for="name" class="control-label">Email address</label>
        <input type="text" class="form-control" id="name" name="name" placeholder="Name" required>
      </div>
    </div>
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form>

JQuery

$(function() {
  $("#myform").validate({
    rules: {
      name: {
        required: true,
        minlength: 2
      }
    },
    highlight: function(element) {
      $(element).closest('.form-group').removeClass('valid').addClass('invalid');
    },
    unhighlight: function(element) {
      $(element).closest('.form-group').removeClass('invalid').addClass('valid');
    },
  });
})

感谢您的帮助.

推荐答案

这些类在最新版本. valid重命名为is-valid，invalid为is-invalid.

These classes have changed in the most recent release. valid was renamed to is-valid and invalid is is-invalid.

此外，它们需要应用于输入，而不是输入组包装.

Also, they need to be applied to inputs, not input group wrappers.

如果要突出显示输入和标签，则需要重新排序.

You need to reorder the input and label if you want both to be highlighted.

$(function() {
  $("#myform").validate({
    rules: {
      name: {
        required: true,
        minlength: 2
      }
    },
    highlight: function(element) {
      $(element).removeClass('is-valid').addClass('is-invalid');
    },
    unhighlight: function(element) {
      $(element).removeClass('is-invalid').addClass('is-valid');
    },
  });
})

.reversed{padding: 3rem 0 0 0;}
.reversed .control-label{margin: -4.5rem 0 0 0; float: left;}

input.is-valid ~ label{color: green;}
input.is-invalid ~ label{color: red;}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.17.0/jquery.validate.min.js"></script>

<form id="myform">
  <div class="row">
    <div class="col-xs-12 col-sm-12 col-md-6 col-lg-6">
      <div class="form-group reversed"><!-- added reversed class -->
        <input type="text" class="form-control" id="name" name="name" placeholder="Name" required>
        <label for="name" class="control-label">Email address</label>
      </div>
    </div>
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form>

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