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- 'use strict';
- var ToInteger = require('es-abstract/2020/ToInteger');
- var ToLength = require('es-abstract/2020/ToLength');
- var ToObject = require('es-abstract/2020/ToObject');
- var SameValueZero = require('es-abstract/2020/SameValueZero');
- var $isNaN = require('es-abstract/helpers/isNaN');
- var $isFinite = require('es-abstract/helpers/isFinite');
- var GetIntrinsic = require('get-intrinsic');
- var callBound = require('call-bind/callBound');
- var isString = require('is-string');
- var $charAt = callBound('String.prototype.charAt');
- var $indexOf = GetIntrinsic('%Array.prototype.indexOf%'); // TODO: use callBind.apply without breaking IE 8
- module.exports = function includes(searchElement) {
- var fromIndex = arguments.length > 1 ? ToInteger(arguments[1]) : 0;
- if ($indexOf && !$isNaN(searchElement) && $isFinite(fromIndex) && typeof searchElement !== 'undefined') {
- return $indexOf.apply(this, arguments) > -1;
- }
- var O = ToObject(this);
- var length = ToLength(O.length);
- if (length === 0) {
- return false;
- }
- var k = fromIndex >= 0 ? fromIndex : Math.max(0, length + fromIndex);
- while (k < length) {
- if (SameValueZero(searchElement, isString(O) ? $charAt(O, k) : O[k])) {
- return true;
- }
- k += 1;
- }
- return false;
- };
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