我需要对电话号码进行简单的验证。该字段已经存在于响应式表单中。因此,我编写了自定义指令并实现了它,但是甚至无法检测到它
我创建了一个单独的指令文件,并且注入了但没有用:(
directive.ts
//custom directive for phone number
import { Directive, ElementRef, Output, EventEmitter, HostListener, Input } from '@angular/core';
@Directive({
selector: '[myNumberOnly]'
})
export class NumberOnlyDirective {
private regex: RegExp = new RegExp(/^-?[0-9]+(\.[0-9]*){0,1}$/g);
private specialKeys: Array<string> = ['Backspace', 'Tab', 'End', 'Home', '-'];
constructor(private el: ElementRef) {
}
@HostListener('keydown', ['$event'])
keydown(event: KeyboardEvent) {
// Allow Backspace, tab, end, and home keys
if (this.specialKeys.indexOf(event.key) !== -1) {
return;
}
let current: string = this.el.nativeElement.value;
let next: string = current.concat(event.key);
if (next && !String(next).match(this.regex)) {
event.preventDefault();
}
}
}
HTML
html部分
<form [formGroup]="arrangeFE">
<input myNumberOnly="true" type="text" formControlName="FEName" class="input_Align" name="" [(ngModel)]="arrangeFieldEngineer.name" [readonly]="arrangeFieldEngineer.isReadonly" placeholder="Enter FE Name"
autocomplete="off">
<form>
需要对电话号码进行自定义验证,并且应使用反应形式。当用户输入正确的电话号码时,只有该号码才能通过ng-valid
答案 0 :(得分:1)
尝试一下:
export class CustomValidator {
// Number only validation
static numeric(control: AbstractControl) {
let val = control.value;
if (val === null || val === '') return null;
if (!val.toString().match(/^[0-9]+(\.?[0-9]+)?$/)) return { 'invalidNumber': true };
return null;
}
}