JSFiddle - React, Tailwind, and code Playground
JavaScript
var ds = "2010-01-01";
var dsArray = ds.split("-");
var date = new Date(dsArray[0], (+dsArray[1])-1, dsArray[2]);
date.setFullYear(date.getFullYear() + 4);
console.log(date);
var ds = "2010-01-01";
var dsArray = ds.split("-");
var date = new Date(dsArray[0], (+dsArray[1])-1, dsArray[2]);
date.setFullYear(date.getFullYear() + 4);
console.log(date);