- Install:
 
- jest: 
npm install --save-dev jest - ts-jest: 
npm install --save-dev ts-jest @types/jest 
- Modify package.json
 
"jest": {
  "transform": {
 "^.+\\.tsx?$": "ts-jest"
| /** | |
| * The examples provided by Facebook are for non-commercial testing and | |
| * evaluation purposes only. | |
| * | |
| * Facebook reserves all rights not expressly granted. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL | |
| * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | 
| /*! | |
| * jQuery TextChange Plugin | |
| * http://www.zurb.com/playground/jquery-text-change-custom-event | |
| * | |
| * Copyright 2010, ZURB | |
| * Released under the MIT License | |
| */ | |
| (function ($) { | |
| $.event.special.textchange = { |