<input class="input" pInputText   [disabled]="disabled" [(ngModel)]="data.input.value"
(change)="inputOnChanges()" (keypress)="keyPress($event)" >

.ts file

const pattern = /^[+]?([0-9]+(?:[\.][0-9]*)?|\.[0-9]+)$/;
console.log('event is::',event);
const inputChar = String.fromCharCode(event.charCode);
if (!pattern.test(inputChar)) {    
    // invalid character, prevent input
    event.preventDefault();
}

I am using above regex. Also, it says charCode is deprecated. Also, keyboard shortcuts should be allowed e.g. copy, paste, arrow keys. Also, user should not be allowed to copy, paste any special characters.