The validation for input type number(n>=0) by JavaScript

hoge_custom_validatior.js

// KUSO-CODE
export class HogeCustomValidatior {
  positiveIntegerValidatator() {
    let elm1 = document.getElementById('number_hoge1');
    let elm2 = document.getElementById('number_hoge2');
    let elms = [elm1, elm2];

    elms.forEach(function (elm) {
      elm.addEventListener('change', function(event){
        if (event.target.value.match(/\D/)) {
          event.target.value = null;
        }
      });
    });
  }
}