AngularJS + Bootstrap - 验证文本框 - 如何在用户输入某些数据后才显示验证反馈？ [英] AngularJS + Bootstrap - Validating Text Box - how to show validation feedback only after the user has entered some data?

问题描述

我正在对文本框进行一些验证。用户输入有效输入后，文本框应变为绿色，并在最右侧角出现刻度标记。同样，如果用户输入的数据无效，则文本框应该变为红色，而应显示十字形。



为此，我使用的是bootstrap的'` has-error has-feedback '`和`' has-success has-feedback '` CSS 类。



我的问题是文本框是绿色的，即使第一次加载页面也有勾选。我需要验证反馈才会在用户输入输入后出现。当表单用于编辑现有记录时，同样适用。我怎样才能做到这一点？ （我不确定我是否可以使用` $ dirty `和' $ pristine `来解决这个问题）



以下是我的标记。

I am doing some validation on text boxes. Once the user enters a valid input, the text box should become green and a tick mark should appear at the rightmost corner. Similarly, if the user has entered an invalid data, text box should become red and a cross should appear instead.

For this, I'm using bootstrap's '`has-error has-feedback'` and `'has-success has-feedback'` CSS classes.

My problem is that the textbox is green and has a tick even when the page is loaded for the first time. I need the validation feedback to appear only after the user has entered an input. And the same applies when the form is used to edit the existing records. How can I achieve this ? (I'm not sure if I could use `$dirty` and '$pristine` to solve this problem)

Below is my Markup.

<div class="form-group" ng-class="(Form.emailAddress.$valid) ? 'has-success has-feedback': 'has-error has-feedback'">
    <label for="emailAddress">Email address</label>
    <span ng-show="!Form.emailAddress.$valid">Please enter a valid address</span>

    <input type="email" class="form-control" id="emailAddress" name="emailAddress" ng-model="Data.emailAddress" ng-pattern="validationPattern" ng-maxlength="20">

    <span ng-show="Form.emailAddress.$valid" class="glyphicon glyphicon-ok form-control-feedback"></span>
    <span ng-show="!Form.emailAddress.$valid" class="glyphicon glyphicon-remove  form-control-feedback"></span>
</div>

我也试过

I also tried

<div ng-class="(contactDetailsForm.emailAddress.$valid) && contactDetailsForm.emailAddress.$dirty ? 'has-success has-feedback': 'has-error has-feedback'">

但是当页面加载时文本框默认变为红色。



关于这个主题的更多问题。



我想检查电子邮件的最大长度，如果超过20，我想显示不同的消息。我试过 Form.emailAddress。$ maxlength 但无法使其正常工作。是否 maxlength 处理'电子邮件'类型为好吧？



如何在用户移动到下一个文本框后显示反馈而不是在输入时显示它？可能类似于jquery的' focusout（）'。



我在控制器中使用了验证模式，因为电子邮件不是必填字段，但是输入它必须是有效的。我能否知道有没有比这更好的方法？



任何帮助p将非常感激。谢谢

but then the textbox becomes red by default when the page is loaded.

A few more questions regarding this topic.

I would like to check the maxlength of the email as well, and if it exceeds 20, I would want to show a different message. I tried Form.emailAddress.$maxlength but couldn't get it working. Does it maxlength work on 'email' types as well ?

How can I show the feedback after the user moves to the next textbox instead of showing it while typing ? May be something similar to jquery's 'focusout()'.

I've used a validation pattern in the controller because email is not a required field, but when entered it has to be valid. Could I please know if there are better ways than doing this ?

Any help would be much appreciated. Thanks

推荐答案

脏`和'

dirty` and '

pristine `解决这个问题）



以下是我的标记。

pristine` to solve this problem)

Below is my Markup.

<div class="form-group" ng-class="(Form.emailAddress.

有效）？'has-success has-feedback'：'has-error has-feedback' > ;
< label = ema ilAddress > 电子邮件地址< / label >
< span ng-show = ！Form.emailAddress。

valid) ? 'has-success has-feedback': 'has-error has-feedback'"> <label for="emailAddress">Email address</label> <span ng-show="!Form.emailAddress.

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