javascript - Angular 2 : Custom validation for fields with numbers only

Question

我试图在 Angular 2 中进行自定义验证，我已经包含了我所需要的知识，但我无法验证

import { FORM_DIRECTIVES, AbstractControl, ControlGroup
,FormBuilder,Control, Validators } from 'angular2/common';
@Component({
selector : 'cusValidate',
template: `
 <form [ngFormModel] = "myform" (ngSubmit) = "onSubmit()">
 <lable>Credit Card Number</lable>
 <div>
 <input type = "text" [ngFormControl] = "inputfield"/>
 <div [class.has-error] = '!inval'>
  </div>
 </div>
 <button type = "submit">Submit</button>
 </form>
`,
directives : [FORM_DIRECTIVES]

})
export class cusValidation{
myform : ControlGroup;
inputfield : AbstractControl;

constructor(fb : FormBuilder){
   this.myform = fb.group({
        'inputfield' : ['' , Validators.compose([Validators.required
,this.formValidator])]
    })
   this.inputfield = this.myform.controls['inputfield']
}

 formValidator(val : Control) :any {
     if(val.value.match(/^123/)){
         return {inval : true};
     }
 }

onSubmit(){
    console.log('submit function called')
}
}
bootstrap(cusValidation);

验证器函数也在我包含的其他文件中，但这里它在类中并且我使用 this.function 访问，还有如何应用适当的 twitter Bootstrap

Answer 1

你正在使用 Angular2，然后你可以使用 html5 表单字段。你为什么不使用'<input type ="number"/> ？