JSFiddle - React, Tailwind, and code Playground

HTML

<input type="datetime-local" name="bday" id="dateInput">

JavaScript

$(document).ready(function(){
  elem = document.getElementById("dateInput")
  var iso = new Date().toISOString();
  var minDate = iso.substring(0,iso.length-1);
  elem.value = minDate
  elem.min = minDate
});