这是演示 plnkr。我正在尝试为具有文本框和验证按钮的 OTP 输入实现自定义异步验证器。我只想在用户单击验证 OTP 按钮或表单提交按钮时验证输入。目前正在文本更改事件上进行验证,但它不起作用。 表单 HTML:
<form [formGroup]="registrationForm" (ngSubmit)="registrationForm.valid && submitRegistration(registrationForm.value)" novalidate>
<fieldset class="form-group">
<label for="e-mail">Mobile</label>
<div class="input-group">
<input type="text" class="form-control" placeholder="Mobile" formControlName="mobile">
<span class="input-group-btn">
<button class="btn btn-secondary" type="button">Send OTP</button>
</span>
</div>
<div class="form-text error" *ngIf="registrationForm.controls.mobile.touched">
<div *ngIf="registrationForm.controls.mobile.hasError('required')">Mobile is required.</div>
</div>
</fieldset>
<fieldset class="form-group">
<label for="e-mail">Verify OTP</label>
<div class="input-group">
<input type="text" class="form-control" placeholder="OTP" formControlName="otp">
<span class="input-group-btn">
<button class="btn btn-secondary" (click)="veryOTPAsyn(otp)" type="button">Verify</button>
</span>
</div>
<div class="form-text error" *ngIf="registrationForm.controls.otp.touched">
<div *ngIf="registrationForm.controls.otp.hasError('required')">OTP is required.</div>
<div *ngIf="registrationForm.controls.otp.hasError('invalidOtp')">OTP is invalid.</div>
</div>
</fieldset>
<button class='btn btn-primary' type='submit' [disabled]='!registrationForm.valid'>Submit Registration Form</button>
</form>
表单组件:
export class ExampleFormComponent {
registrationForm: FormGroup;
constructor(public fb: FormBuilder) {
// Example use of FormBuilder, FormGroups, and FormControls
this.registrationForm = fb.group({
mobile: ['', Validators.required],
otp: ['', Validators.compose([Validators.required, this.veryOTPAsyn.bind(this)])],
dob: ['', Validators.required],
email: ['', Validators.compose([Validators.required, emailValidator])],
password: ['', Validators.required],
confirmPassword: ['', Validators.required],
firstName: ['', Validators.required],
lastName: ['', Validators.required]
}, {validator: matchingPasswords('password', 'confirmPassword')})
}
submitRegistration(value: Object): void {
console.log(value);
}
veryOTPAsyn(otpControl: FormControl): Promise<any> {
console.log(otpControl)
console.log(otpControl.hasError('invalidOtp'))
return new Promise<any>(
(resolve, reject) => {
setTimeout(() => {
resolve({invalidOtp:true});
}, 500);
});
}
}