angular响应式表单笔记

angular 在开发过程中对于表单的验证

import {ReactiveFormsModule, FormsModule, FormControl, FormGroup, Validators} from "@angular/forms";
//表单内容对象
public user = {name: '', password: ''};
//表单
public arrList = null;


constructor(
  public modalService: BsModalService,
  public config: ConfigService,
  public common: CommonFucService,
  public router: Router,
) {
  //为表单定义属性
  this.arrList = new FormGroup({
    //formState可以为空/可以绑定其他对象中的key
    //validatorOrOpts设置校验规则
    'userName': new FormControl(
      this.user.name || '', [
        Validators.minLength(1),
        Validators.maxLength(25),
        Validators.required,
        Validators.pattern(this.common.regex_list.name)
      ])
  })
}

submitFun() {
  console.log('===========================');
  console.log(this.arrList);
  console.log(this.arrList.value);
  console.log('===========================');
}

--------------------------------HTML---------------------------------------------
<form (ngSubmit)="submitFun()" [formGroup]="arrList">
  表单
  <input formControlName="userName" name="userName" type="text">
  <div *ngIf="arrList.get('userName').invalid&&(arrList.get('userName').touched ||arrList.get('userName').dirty)">
    <span *ngIf="arrList.get('userName').hasError('minlength')" class="font_12 red">长度太短</span>
    <span *ngIf="arrList.get('userName').hasError('maxlength')" class="font_12 red">长度太长</span>
    <span *ngIf="arrList.get('userName').hasError('required')" class="font_12 red">此选项为必填项</span>
    <span *ngIf="arrList.get('userName').hasError('pattern')" class="font_12 red">填写错误</span>
  </div>
  <button class="btn_red" type="submit">提交</button>
</form>
-------------------------------------截图------------------------------------------------

来自为知笔记(Wiz)