Angular 无法将输入参数发送到中的验证程序指令
我在我的项目StackBlitz ref is中有一个简单的清晰输入 因此,我尝试将模板代码appMyCheck=12发送的参数myValue发送到指令中,并将其打印出来。但它总是显示未定义的值Angular 无法将输入参数发送到中的验证程序指令,angular,angular-directive,vmware-clarity,Angular,Angular Directive,Vmware Clarity,我在我的项目StackBlitz ref is中有一个简单的清晰输入 因此,我尝试将模板代码appMyCheck=12发送的参数myValue发送到指令中,并将其打印出来。但它总是显示未定义的值 如何将参数正确地发送到validator指令?我编辑您的代码,它就可以工作了 希望有用是的,谢谢。我需要在useExisting:forwardRef=>MyCheckDirective上替换useClass:MyCheckDirective <div class="clr-form-c
如何将参数正确地发送到validator指令?我编辑您的代码,它就可以工作了
希望有用是的,谢谢。我需要在useExisting:forwardRef=>MyCheckDirective上替换useClass:MyCheckDirective
<div class="clr-form-control" [ngClass]="{'clr-error': myInput.errors}">
<label class="clr-control-label">My Input</label>
<div class="clr-control-container">
<div class="clr-input-wrapper">
<input id="myinput" type="number" class="clr-input" min="1" max="10"
[(ngModel)]="inputValue" #myInput="ngModel" appMyCheck="12"/>
<clr-icon class="clr-validate-icon" shape="exclamation-circle"></clr-icon>
</div>
<span class="clr-subtext" *ngIf="myInput.errors?.inRange">
Error
</span>
</div>
</div>
@Directive({
selector: '[appMyCheck]',
providers: [{provide: NG_VALIDATORS, useClass: MyCheckDirective, multi: true}]
})
export class MyCheckDirective implements Validator {
@Input('appMyCheck') myValue;
constructor() { }
validate(control: AbstractControl): {[key: string]: any} | null {
console.log('in validate ', this.myValue);
return null;
}
}
in validate undefined
in validate undefined
import {Directive, Input, forwardRef} from '@angular/core';
import {AbstractControl, NG_VALIDATORS, Validator} from "@angular/forms";
@Directive({
selector: '[appMyCheck]',
providers: [{
provide: NG_VALIDATORS,
useExisting: forwardRef(() => MyCheckDirective),
multi: true
}]
})
export class MyCheckDirective implements Validator {
isValid: any = false;
@Input('appMyCheck') myValue;
set setter (state) {
this.isValid = state;
};
constructor() { }
validate(formController: AbstractControl) {
const validationState = !this.isValid ? {
customKey: true
} : null;
console.log('validation state: ', validationState);
return validationState;
}
}