javascript - AngularJS - 如何仅对活动字段使用 ng-required

Question

• 我有一个切换按钮所在的应用程序，当单击它时，它会激活用户输入字段。
• 字段在一页上，按钮调用如下：

<span ng-include="'partials/triggers/toggleButton.html'"></span>
<a ng-click="toggle()">
<span class="glyphicon" ng-class="{'glyphicon-ban-circle': t.active, 'glyphicon-ok-circle': !t.active}"></span>
</a>
<div ng-controller="TriggerController" ng-init="init(relay, 'inactiveFor')">
<fieldset class="form-group sentinel-line" ng-disabled="!t.active">
<div class="form-group" bs-has-error>
<input type="text" name="timerEveryMinute" class="form-control" ng-model="t.on.val" ng-pattern="/^(((([1-9])|([1-9][0-9])|([1-9][0-9][0-9])|([1-9][0-9][0-9][0-9]))))$/"/> minutes
<span ng-show="form.timerEveryMinute.$invalid && showInvalids" class="formError">Incorrect value</span>
</div>
<span style="color:#B40404" class="help-block" ng-show="!form.timerEveryMinute.$valid">
Invalid! Must be number with max four digits, without decimals.
<br>Correct: "2" or "23" or "2323" . Incorrect: "2,32" or "23.2" or "232323" .
</span>
<div class="form-group" bs-has-error>
<input type="text" name="timerForMinute" class="form-control" ng-model="t.off.val" ng-pattern="/^(((([1-9])|([1-9][0-9])|([1-9][0-9][0-9])|([1-9][0-9][0-9][0-9]))))$/"/> minutes...
<span ng-show="form.timerForMinute.$invalid && showInvalids" class="formError">Incorrect value</span>
</div>
<span style="color:#B40404" class="help-block" ng-show="!form.timerForMinute.$valid">
Invalid! Must be number with max four digits, without decimals.`
`<br>Correct: "2" or "23" or "2323" . Incorrect: "2,32" or "23.2" or "232323" .
</span>
<span ng-include="'partials/triggers/toggleButton.html'"></span>
</fieldset>
</div>

• 仅当通过切换按钮激活字段时，如何使字段为必填（非空）？正则表达式在这里不起作用，它仅在用户进行一些输入时才起作用。

整个代码在这里： https ://github.com/romanicak/growduino-client/tree/master/src

标签： javascripthtmlangularjsangularjs-directiveangularjs-forms

Answer 1

在控制器中使用变量来跟踪字段是否是必需的：

$scope.isRequired = false;

单击按钮时，切换该变量

<button ng-click="isRequired = !isRequired">

在您的输入中，将要求绑定到该变量：

<input type="text" ng-model="myinput" ng-required="isRequired" />

而已。即使您没有在控制器中定义变量，它也会起作用。

工作 JSFiddle