I have to restrict user to enter only numbers in a field in Angular2->form
I have solution but backspace is not working in input field
Can anybody have proper solution for that?

form.html

<input (keypress)=keyPress($event) minlength=8 maxlength=15 required />

form.component.ts

keyPress(event: any) {

    const pattern = /[0-9+- ]/;

    let inputChar = String.fromCharCode(event.charCode);

    // console.log(inputChar, e.charCode);

       if (!pattern.test(inputChar)) {

       // invalid character, prevent input

           event.preventDefault();

      }

 }

On kepress event it restrict user to enter only numbers but problem with this code is backspace, tab keys are not working.So, this code is not as per my expectation...