| | |
| | | 'use strict'; |
| | | var $ = require('../internals/export'); |
| | | var uncurryThis = require('../internals/function-uncurry-this'); |
| | | var requireObjectCoercible = require('../internals/require-object-coercible'); |
| | | var toIntegerOrInfinity = require('../internals/to-integer-or-infinity'); |
| | | var toString = require('../internals/to-string'); |
| | | var fails = require('../internals/fails'); |
| | | |
| | | var charAt = uncurryThis(''.charAt); |
| | | |
| | | var FORCED = fails(function () { |
| | | return '𠮷'.at(0) !== '\uD842'; |
| | | // eslint-disable-next-line es-x/no-array-string-prototype-at -- safe |
| | | return '𠮷'.at(-2) !== '\uD842'; |
| | | }); |
| | | |
| | | // `String.prototype.at` method |
| | |
| | | var len = S.length; |
| | | var relativeIndex = toIntegerOrInfinity(index); |
| | | var k = relativeIndex >= 0 ? relativeIndex : len + relativeIndex; |
| | | return (k < 0 || k >= len) ? undefined : S.charAt(k); |
| | | return (k < 0 || k >= len) ? undefined : charAt(S, k); |
| | | } |
| | | }); |