this.contactForm.controls['postalCode'].setErrors({ required: true }); } else { this.contactForm.controls['postalCode'].setErrors({ required: false }); }return null;Compiling application & starting dev server…angular-8-reactive-form-hudnxp.stackblitz.io Console Clear on reload...
StackBlitz Fork Share Angular (forked) Non-commercial Sign inGet startedProject Info Angular (forked) Reactive Form Example 160 views0 forks Files src New File New Folder Angular Generator Component Service Directive Module Pipe Guard Interface Class Enum Rename Delete app New File New Folder Angular...
https://stackblitz.com/edit/angular-rjrspr?file=app%2Fapp.component.html 正如您在下图中所看到的,如果我[value]="null"在select中使用,该字段将获得"null"(字符串文字)作为值.但是,如果我使用[ngValue]="null"它获得预期null值. 我认为使用的value是用于反应形式,而ngValue用于模板驱动的形式.我想知道在...
对于带有standalone: true的独立组件、指令或管道,可以直接在@Component()组件声明中 import,而无需通过@NgModule()来 import. 而且在@Component()中也可以引入一个模块, 这样 Angular 独立组件不仅可以引用 standalone 形式的独立组件、指令或管道也可以兼容以 module 形式组织的旧的物件. 探索新的Stackblitz 演示应...
EXAMPLE TS HTML SCSSEdit in: CodesandboxStackBlitzReactive FormsReactive form validation is achieved by adding validator functions directly to the form control model in the component class. After creating the control in the component class, it should be associated with a form control element in the ...
@Directive({ selector: 'a[href]', standalone: true,})export class ExcludeMailToDirective { readonly regex = new RegExp(/^mailto:/); constructor(el: ElementRef) { if (!this.regex.test(el.nativeElement.href)) el.nativeElement.style.backgroundColor = 'pink'; }} Sample StackBlitz ...
从StackBlitz 示例中,此注入将具有relation属性值parent(relation="parent"的Relation指令注入consumer: @SkipSelf() private myParent:Relation 注入子指令(或多个指令) 如果需要将嵌套 HTML 上定义的指令注入父指令/组件中,有四个装饰器可以帮助我们: @ViewChild/@ViewChildren @ContentChild/@ContentChildren 正如这些...
Angular Date Time Editor Directive Example EXAMPLE TS HTML SCSS Edit in:CodesandboxStackBlitz Like this sample? Get access to our complete Ignite UI for Angular toolkit and start building your own apps in minutes.Download it for free. 60+ components, flexible API, powerful theming and branding ca...
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我也试过这个medium_example,它在html中引起了这些问题control.registerOnChange不是一个函数 必须为名称为'validator'的表单控件提供值。来源链接StackBlitzangular angular-reactive-forms formbuilder formarray 1个回答 0投票 有一些事情,根据下面的代码应该变得明确...在你的stackblitz上,替换以下2个文件中的代码 -...