|
Last change
on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 13 days ago |
|
Fix frontend appearance
|
-
Property mode
set to
100644
|
|
File size:
568 bytes
|
| Line | |
|---|
| 1 | 'use strict';
|
|---|
| 2 | var getBuiltIn = require('../internals/get-built-in');
|
|---|
| 3 | var uncurryThis = require('../internals/function-uncurry-this');
|
|---|
| 4 |
|
|---|
| 5 | var Symbol = getBuiltIn('Symbol');
|
|---|
| 6 | var keyFor = Symbol.keyFor;
|
|---|
| 7 | var thisSymbolValue = uncurryThis(Symbol.prototype.valueOf);
|
|---|
| 8 |
|
|---|
| 9 | // `Symbol.isRegisteredSymbol` method
|
|---|
| 10 | // https://tc39.es/proposal-symbol-predicates/#sec-symbol-isregisteredsymbol
|
|---|
| 11 | module.exports = Symbol.isRegisteredSymbol || function isRegisteredSymbol(value) {
|
|---|
| 12 | try {
|
|---|
| 13 | return keyFor(thisSymbolValue(value)) !== undefined;
|
|---|
| 14 | } catch (error) {
|
|---|
| 15 | return false;
|
|---|
| 16 | }
|
|---|
| 17 | };
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
