28 lines
999 B
JavaScript
28 lines
999 B
JavaScript
|
var $ = require('../internals/export');
|
||
|
|
var toAbsoluteIndex = require('../internals/to-absolute-index');
|
||
|
|
|
||
|
|
var fromCharCode = String.fromCharCode;
|
||
|
|
var nativeFromCodePoint = String.fromCodePoint;
|
||
|
|
|
||
|
|
// length should be 1, old FF problem
|
||
|
|
var INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;
|
||
|
|
|
||
|
|
// `String.fromCodePoint` method
|
||
|
|
// https://tc39.github.io/ecma262/#sec-string.fromcodepoint
|
||
|
|
$({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
|
||
|
|
fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars
|
||
|
|
var elements = [];
|
||
|
|
var length = arguments.length;
|
||
|
|
var i = 0;
|
||
|
|
var code;
|
||
|
|
while (length > i) {
|
||
|
|
code = +arguments[i++];
|
||
|
|
if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
|
||
|
|
elements.push(code < 0x10000
|
||
|
|
? fromCharCode(code)
|
||
|
|
: fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
|
||
|
|
);
|
||
|
|
} return elements.join('');
|
||
|
|
}
|
||
|
|
});
|