JSFiddle - React, Tailwind, and code Playground

by Qwerty_Wasd

HTML

<input id="data" type="text"/>

JavaScript

data.oninput=function() {
  let tmp = this.value.replace(/[^\d]/g, '').substring(0,8);
	console.log(tmp.match(/(.{2})(.{2})(.{4})/));
  tmp = tmp != '' ? tmp.match(/(.{2})(.{2})(.{4})/).slice(1,4).join('/') : '';
  this.value = tmp;
}