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unboundedpress/node_modules/core-js/modules/es6.string.from-code-point.js

24 lines
865 B
JavaScript

5 years ago
var $export = require('./_export');
var toAbsoluteIndex = require('./_to-absolute-index');
var fromCharCode = String.fromCharCode;
var $fromCodePoint = String.fromCodePoint;
// length should be 1, old FF problem
$export($export.S + $export.F * (!!$fromCodePoint && $fromCodePoint.length != 1), 'String', {
// 21.1.2.2 String.fromCodePoint(...codePoints)
fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars
var res = [];
var aLen = arguments.length;
var i = 0;
var code;
while (aLen > i) {
code = +arguments[i++];
if (toAbsoluteIndex(code, 0x10ffff) !== code) throw RangeError(code + ' is not a valid code point');
res.push(code < 0x10000
? fromCharCode(code)
: fromCharCode(((code -= 0x10000) >> 10) + 0xd800, code % 0x400 + 0xdc00)
);
} return res.join('');
}
});