core-js/modules/es.string.includes.js

'use strict';
var $ = require('../internals/export');
var notARegExp = require('../internals/not-a-regexp');
var requireObjectCoercible = require('../internals/require-object-coercible');
var correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');

// `String.prototype.includes` method
// https://tc39.github.io/ecma262/#sec-string.prototype.includes
$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('includes') }, {
  includes: function includes(searchString /* , position = 0 */) {
    return !!~String(requireObjectCoercible(this))
      .indexOf(notARegExp(searchString), arguments.length > 1 ? arguments[1] : undefined);
  }
});