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- 'use strict';
- var $ = require('../internals/export');
- var uncurryThis = require('../internals/function-uncurry-this');
- var toAbsoluteIndex = require('../internals/to-absolute-index');
-
- var $RangeError = RangeError;
- var fromCharCode = String.fromCharCode;
- // eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
- var $fromCodePoint = String.fromCodePoint;
- var join = uncurryThis([].join);
-
- // length should be 1, old FF problem
- var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length !== 1;
-
- // `String.fromCodePoint` method
- // https://tc39.es/ecma262/#sec-string.fromcodepoint
- $({ target: 'String', stat: true, arity: 1, forced: INCORRECT_LENGTH }, {
- // eslint-disable-next-line no-unused-vars -- required for `.length`
- fromCodePoint: function fromCodePoint(x) {
- var elements = [];
- var length = arguments.length;
- var i = 0;
- var code;
- while (length > i) {
- code = +arguments[i++];
- if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw new $RangeError(code + ' is not a valid code point');
- elements[i] = code < 0x10000
- ? fromCharCode(code)
- : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00);
- } return join(elements, '');
- }
- });
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