angular - md-input maxlength not working -

even if add maxlength="250" can enter value in agular2-material md-input.

1. is there anyway can disable input field entering text after 250 char.
2. is there alternative maxlenth.

my form input :

<div class="form-group">   <md-input type="text" required placeholder="name" formcontrolname="name" #namecounthint             maxlength="250" class="full-width" dividercolor="{{changeform.controls.name.valid ? 'primary': 'accent'}}">     <md-hint align="end">{{namecounthint.charactercount}} / 250</md-hint>   </md-input>   <agile-control-messages color="primary" [control]="teamform.controls.name"></agile-control-messages> </div> 

any great.

i found simple demo on how have validation , maybe you.

component template:

 <form [ngformmodel]="someformhandle"              [(ngsubmit)="onsubmit()">              <input class="form-control"                    [ngformcontrol]="somenumber">              <button class="btn btn-primary"                      [disabled]="!someformhandle.valid">                     submit             </button>  </form> 

component:

@component({   selector: 'some-form',   templateurl: './some-form.component.html',   directives: [form_directives] }) export class someform implements oninit {    someformhandle:controlgroup;   somenumber:abstractcontrol;    constructor(private formbuilder:formbuilder) {   }    divisiblebyten(control:control) {       return parseint(control.value) % 10 == 0 ? null : {         divisiblebyten: true       }   }    onsubmit(){     //some submit logic   }    ngoninit():void {     this.someformhandle = this.formbuilder.group({       'somenumber': ['', validators.compose([validators.required,                                               validators.maxlength(250),                                               this.divisiblebyten])]     });      this.somenumber = this.someformhandle.find('somenumber');   }  }