JSFiddle - React, Tailwind, and code Playground

by Liam Talbot

HTML

---<div id="includeThis">
11111
</div>-----

JavaScript

if (!String.prototype.includesThis) {
  String.prototype.includesThis = function(search, start) {
    'use strict';
    if (typeof start !== 'number') {
      start = 0;
    }

    if (start + search.length > this.length) {
      return false;
    } else {
      return this.indexOf(search, start) !== -1;
    }
  };
}

document.getElementById("includeThis").innerHTML = "New text!".includes('texd');