36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
'use strict';
|
|
|
|
var ToInteger = require('es-abstract/2018/ToInteger');
|
|
var ToLength = require('es-abstract/2018/ToLength');
|
|
var ToObject = require('es-abstract/2018/ToObject');
|
|
var SameValueZero = require('es-abstract/2018/SameValueZero');
|
|
var $isNaN = require('es-abstract/helpers/isNaN');
|
|
var $isFinite = require('es-abstract/helpers/isFinite');
|
|
var GetIntrinsic = require('es-abstract/GetIntrinsic');
|
|
var callBound = require('es-abstract/helpers/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;
|
|
};
|