JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-git2.min.js"></script>
<label>Date:</label><input name="date" id="dateChange" type="date"/><input id="SubtractDay" type="button" value="-" /><input id="AddDay" type="button" value="+" />

JavaScript

var counter = 0;

$("#SubtractDay").click(function() {
	counter--;
	var today = new Date();
	today.setDate(today.getDate() + counter);
	var formattedDate = new Date(today);
	var d = ("0" + formattedDate.getDate()).slice(-2);
	var m = ("0" + (formattedDate.getMonth() + 1)).slice(-2);
	var y = formattedDate.getFullYear();
	$("#dateChange").val(d + "/" + m + "/" + y);
});
$("#AddDay").click(function() {
	counter++;
	var today = new Date();
	today.setDate(today.getDate() + counter);
	var formattedDate = new Date(today);
	var d = ("0" + formattedDate.getDate()).slice(-2);
	var m = ("0" + (formattedDate.getMonth() + 1)).slice(-2);
	var y = formattedDate.getFullYear();
	$("#dateChange").val(d + "/" + m + "/" + y);
});