Javascript 验证引导模式中的输入文本

Validate input text in bootstrap modal

提问by mkab

I want to validate a form in a bootstrap modal without using any framework. It's actually a simple modal with only an input text and two buttons "Close" and "Send". The user should type his/her name in the input box and click send. The form is the sent with the method post.

我想在不使用任何框架的情况下以引导模式验证表单。它实际上是一个简单的模式，只有一个输入文本和两个按钮“关闭”和“发送”。用户应在输入框中键入他/她的姓名，然后单击发送。表单是使用方法 post 发送的。

What I want to do is that, if the user doesn't enter anything in the input box of and clicks on the button "Send", the input box should have a red border circling it instead of the default blue border. Here's the code for my modal:

我想要做的是，如果用户没有在输入框中输入任何内容并单击“发送”按钮，则输入框应该有一个红色边框环绕它而不是默认的蓝色边框。这是我的模态代码：

<div id="myModal" class="modal fade" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <!--form-->

            <form class = "form-horizontal" id="myForm" method="post" action="test.php" role="form">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                    <h4 class="modal-title">My modal</h4>
                </div>
                <div class="modal-body">
                    <p>
                        Please enter your name:
                    </p>
                    <br/>

                    <div class="form-group">

                        <div class="col-lg-12">
                            <label class="control-label" for="firstname">Name</label>
                            <input type="text" class="form-control required" id="firstname" name="firstname">
                        </div>
                    </div>

                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                    <button id="myFormSubmit" class="btn btn-primary">Send</button>
                </div>
            </form>
        </div>
    </div>
</div>

I tried using javascript to change the class of the input text to has-errorbut it doesn't produce the red outline. When I click on send it sends the empty value through the post method instead of Here's my javascript code:

我尝试使用 javascript 将输入文本的类更改为，has-error但它不会产生红色轮廓。当我点击发送时，它通过 post 方法发送空值，而不是这是我的 javascript 代码：

    <script type="text/javascript">
        $('#myForm').validate({
            rules: {
                name: {
                    minlength: 1,
                    required: true
                },
            },
            highlight: function (element) {
                $('#firstname').removeClass('has-success').addClass('has-error');
            },
            success: function (element) {
                $('#firstname').removeClass('has-error').addClass('has-success');
            }
        });
    </script>

I feel like I'm mixing a whole lot of things here. I'm still new to bootstrap and javascript. How can I go about getting the desired red outline? Thanks.

我觉得我在这里混合了很多东西。我对 bootstrap 和 javascript 还是个新手。我怎样才能获得所需的红色轮廓？谢谢。

Edit: Validate function:

编辑：验证功能：

function validate() {
    var x = document.forms["myForm"]["firstname"].value;
    if (x == null || x == "") {
        return false;
    }
}

回答by Plamen Nikolov

You need to change the CSSclasses of the inputparentelement div.form-group, not the inputitself:

您需要更改父元素的CSS类，而不是它本身：inputdiv.form-groupinput

The HTMLafter the submit button click should look like this:

在HTML提交按钮点击后应该是这样的：

<div class="form-group has-error">
   <div class="col-lg-12">
      <label class="control-label" for="firstname">Name</label>
      <input type="text" class="form-control required" id="firstname" name="firstname">
    </div>
</div>

To achieve this, alter your JavaScriptcode to this:

为此，请将您的JavaScript代码更改为：

<script type="text/javascript">
  $('#myForm').on('submit', function(e) {
    var firstName = $('#firstname');

    // Check if there is an entered value
    if(!firstName.val()) {
      // Add errors highlight
      firstName.closest('.form-group').removeClass('has-success').addClass('has-error');

      // Stop submission of the form
      e.preventDefault();
    } else {
      // Remove the errors highlight
      firstName.closest('.form-group').removeClass('has-error').addClass('has-success');
    }
  });
</script>

回答by Minesh

div in boot strap...

引导带中的 div...

<div class="form-group">
    <div class="row">

        <label class="col-xs-2 col-sm-2 control-label">city:</label>

        <div class="col-xs-3 col-sm-3 formGroups"
            id="city_form1">
            <form:input name="city" class="form-control"
                placeholder="City" data-toggle="tooltip"
                data-placement="bottom" title="City" maxlength="15" />

            <small class="help-block col-sm-offset-0 col-sm-9"
                style="display: none;">city must require</small>
        </div>
    </div>
</div>

as you see there is .help-block is display: none now you write javascript function and check validation and if validation now pass make it display: block ... that's way you can do

如您所见，有 .help-block is display: none 现在您编写 javascript 函数并检查验证，如果验证现在通过，则使其显示：阻止...这是您可以做的

enjoy with boot strap :)

享受与引导带:)

回答by Minesh

its very easy

这很容易

just apply class .has-error to div by javascript function

只需通过 javascript 函数将 class .has-error 应用到 div

<div class="form-group has-error">
    <div class="row">

        <label class="col-xs-2 col-sm-2 control-label">city:</label>

        <div class="col-xs-3 col-sm-3 formGroups"
            id="city_form1">
            <form:input name="city" class="form-control"
                placeholder="City" data-toggle="tooltip"
                data-placement="bottom" title="City" maxlength="15" />

        </div>
    </div>
</div>

回答by stephen carvalho

Just use required inside the input field like this

只需在输入字段中使用 required 就像这样

<input type="text" class="form-control required" id="firstname" name="firstname" required/>