IE does not support Array includes or String includes methods

Question

I have been working on a project and developing a JavaScript framework. The original code is about 700 lines so I only pasted this line. The includes method doesn\'t work on

Answer 1

This Selected answer is for String, if you are looking for 'includes' on an array, I resolved my issue by adding the following to my polyfills.ts file:

import 'core-js/es7/array';