在 Angular 4 的 Reactive 表单内的单选按钮组中有条件地禁用单选按钮 [英] Disable a radio button conditionally in a radio button group inside Reactive form in Angular 4

问题描述

我在组件中创建了一个响应式表单，并在其上定义了一些 formControls.

现在我需要根据某些条件禁用单选按钮组中的一个单选按钮.

在创建 formControl 时我该怎么做?

PFB 代码片段:

createForm() {this.heroForm = this.fb.group({ConfirmActionRadioGrp: this.fb.group({updateAction: new FormControl({ value: '' })})});}

在我的模板中:

 
<input type="radio" class="custom-control-input" value="1" formControlName="updateAction"><input type="radio" class="custom-control-input" value="2" formControlName="updateAction"><input type="radio" class="custom-control-input" value="3" formControlName="updateAction"></div>

现在如何有条件地禁用其中之一?使用 [disable] 属性时，我在浏览器控制台中收到一些警告.Angular 不鼓励这样做

解决方案

忽略浏览器警告并在输入中使用 disabled 属性.如果您愿意，可以使用:

[attr.disabled]="whatever"

相反，这应该使警告静音.根据此未解决的问题，Angular 反应式表单目前不支持通过 formcontrol/formgroup API 禁用组中的单个单选按钮:

https://github.com/angular/angular/issues/11763

I have a reactive form created in component and some formControls defined on it.

Now i need to disable one of the radio button from a radio button group based on some condition.

How do i do it while creating formControl?

PFB the code snippet:

createForm() {
this.heroForm = this.fb.group({
  confirmActionRadioGrp: this.fb.group({
            updateAction: new FormControl({ value: '' })
        })

  });
}

inside my template:

    <div class="form-group confirm-action-radio-container" formGroupName="confirmActionRadioGrp">
<input  type="radio"  class="custom-control-input" value="1" formControlName="updateAction">
    <input  type="radio"  class="custom-control-input" value="2" formControlName="updateAction">
    <input  type="radio"  class="custom-control-input" value="3" formControlName="updateAction"></div>

Now how to disable one of them conditionally? when using [disable] attribute i get some warning in browser console. Angular doesn't encourage doing it

解决方案

Ignore the browser warning and use the disabled attribute on the input. If you'd like you can use :

[attr.disabled]="whatever"

instead which should silence the warning. Angular reactive forms do not currently support disabling individual radio buttons in a group through the formcontrol / formgroup API as per this open issue:

https://github.com/angular/angular/issues/11763

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