JSFiddle - React, Tailwind, and code Playground

by madhawa11111

HTML

<input type="text" onkeyup="checkInput(this)"/>

JavaScript

function checkInput(ob) {
  var invalidChars = /[^0-9]/gi
  if(invalidChars.test(ob.value)) {
            ob.value = ob.value.replace(invalidChars,"");
      }
}