在Angular 4中,要更改AsyncValidator的响应,可以通过自定义AsyncValidator函数来实现。AsyncValidator是一种用于异步验证表单控件的验证器。 首先,需要创建一个自定义的AsyncValidator函数。这个函数接收一个FormControl作为参数,并返回一个Observable对象。Observable对象可以发出一个null值(表示验证通过)或一个对象(表示验证失...
问Angular Async Validator FormControls在模糊之前不会更新EN然后，我将finalize()添加到异步验证器中的计...
if(this.status===VALID||this.status===PENDING) {this._runAsyncValidator(opts.emitEvent); } functionsetUpControl(control, dir) {//xxx 省略若干control.validator=Validators.compose([/**@type{?} */(control.validator), dir.validator, ]); control.asyncValidator=Validators.composeAsync([/**@type{...
/**/ mySyncValidator(form: FormGroup): { [s: string]: boolean } { const field1 = form.get('field1').value; const field2 = form.get('field2').value; ... }; 现在,我应该怎么做才能以异步方式完成完全相同的事情(基本上是调用执行httpClient请求的服务)? Angular文档中提供的所有示例都与...
In this guide let us learn how to create a custom async validator in Angular. The creating an async validator is very similar to the Sync validators. The only difference is that the async Validators must return the result of the validation as an observable (or as Promise)....
写一个验证email唯一性的Directive,页面大致如下表现: Email already in use 以上,data-my-unique-key用来接收主键,data-my-unique-property用来接受email这个值。 Directive部分大致如下: (function(){varinjectParams = ['$q
A very simple, fast and customizable async data validator typescriptschemavalidationasyncvalidatorvalidateasync-validation UpdatedOct 17, 2023 TypeScript Demo:https://mainawycliffe.github.io/angular-async-validator/ angularasync-validationangular-reactive-forms ...
ERROR Error: Expected validator to return Promise or Observable. with: new FormControl(question.value || '', null,this.AsyncValidator(question)) But it's ok if you have: new FormControl(question.value || '', Validators.required, this.AsyncValidator(question)) ...
在使用AsyncValidator格式时,我们需要遵循以下步骤: 1.导入必要的依赖-首先,我们需要导入相关的依赖。通常我们会使用一些具有AsyncValidator功能的库,例如Angular的angular/forms或React的react-hook-form。 2.定义异步验证器函数-接下来,我们需要定义异步验证器函数。该函数将负责执行验证逻辑并返回验证结果。 3.在表单控...
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