is-registered-symbol

Is this value a Symbol stored in the global cross-realm Symbol registry?

Example

var isRegisteredSymbol = require('is-registered-symbol');

var assert = require('assert');

assert(!isRegisteredSymbol(null));
assert(!isRegisteredSymbol(undefined));
assert(!isRegisteredSymbol('foo'));
assert(!isRegisteredSymbol(Symbol.iterator));
assert(!isRegisteredSymbol(Symbol()));
assert(isRegisteredSymbol(Symbol.for('yogurt')));

Tests

Simply clone the repo, npm install, and run npm test