angularjs - angular 2 form validation giving undefined error message -


i followed angular 2 tutorial , tried implement validation in angular 2 form. see code:

<form #loginform="ngform" (ngsubmit)="login()">     <div>         <label for="email">email:</label>         <input type="text" id="email" name="email" required minlength="4" maxlength="24" [(ngmodel)]="emailfield" #name="ngmodel" />         <div *ngif="email?.errors && (email?.dirty || email?.touched)" class="alert alert-danger">             <div [hidden]="!email.errors.required">               email required             </div>             <div [hidden]="!email.errors.minlength">               email must @ least 4 characters long.             </div>             <div [hidden]="!email.errors.maxlength">               name cannot more 24 characters long.             </div>         </div>     </div>       <div>         <label>password:</label><input type="password" name="password" [(ngmodel)]="passwordfield" />     </div>     <div>         <button [disabled]="!loginform.form.valid" type="submit">submit</button>     </div> </form>

the problem getting error code : 

error error: uncaught (in promise): typeerror: cannot read property 'errors' of undefined

i tried implement in tutorial on official site: https://angular.io/docs/ts/latest/cookbook/form-validation.html#!#template1

the answer( george k ) accidentally wrote #name="ngmodel" instead of #email="ngmodel"


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