angular中两种表单的区别(响应式和模板驱动表单)

    //ts
    profileForm = new FormGroup({
      firstName: new FormControl(''),
      lastName: new FormControl(''),
      address: new FormGroup({
       street: new FormControl(""),
       city: new FormControl(""),
       state: new FormControl(""),
       zip: new FormControl("")
      })
     })
    //html
    <input type="text" formControlName="firstName">

//html
<form #heroForm="ngForm" appIdentityRevealed (ngSubmit)="onSubmit()">
  <div >
   <label for="name">Name</label>
   <input type="text" id="name" required [(ngModel)]="model.name" [ngModelOptions]="{updateOn: 'blur'}" name="name">

  <div >
   <label for="power">Hero Power</label>
   <select id="power" class="form-control" required [(ngModel)]="model.power" name="power">
    <option *ngFor="let power of powers" [value]="power">{{power}}</option>
   </select>
  </div>

  <button type="button" (click)="newHero();heroForm.reset()">
   New Hero
  </button>
  <button type="submit" [disabled]="!heroForm.form.valid">
   Submit
  </button>
 </form>
//ts
model = new Hero(18, 'Dr IQ', this.powers[0], 'Chuck Overstreet');

function forbiddenNameValidator(value: string): ValidatorFn {
  return (control: AbstractControl): { [key: string]: any } | null => {
    const rule = new RegExp(value,'i');//设定验证规则,i是忽略大小写的意思
    const result = rule.test(control.value);//control.value是输入框的值,forbidden是正则结果
    return result ? { 'forbiddenName': { value: control.value } } : null;//如果匹配成功,则返回对象
  };
}

firstName:['',[forbiddenNameValidator('bob')]],

//ts
import { Directive, Input } from '@angular/core';
import { AbstractControl, NG_VALIDATORS, Validator, ValidatorFn, ValidationErrors } from '@angular/forms';
import { FormGroup } from '@angular/forms';
export function forbiddenNameValidator(nameRe: RegExp): ValidatorFn {
 return (control: AbstractControl): { [key: string]: any } | null => {
  const forbidden = nameRe.test(control.value);
  return forbidden ? { 'forbiddenName': { value: control.value } } : null;
 };
}

@Directive({
 selector: '[appForbiddenName]',
 providers: [{ provide: NG_VALIDATORS, useExisting: ForbiddenValidatorDirective, multi: true }]
})
export class ForbiddenValidatorDirective implements Validator {
 @Input('appForbiddenName') forbiddenName: string;

 validate(control: AbstractControl): { [key: string]: any } | null {
  return this.forbiddenName ? forbiddenNameValidator(new RegExp(this.forbiddenName, 'i'))(control)
   : null;
 }
}
//html
<input type="text" required [(ngModel)]="model.name" name="name" appForbiddenName="bob">