Global symbols in JavaScript

Using the Symbol.for method, you can create symbols with a name. These symbols will be stored in the global Symbol registry and can be retrieved from anywhere in the code.

Let's see how it works. Let's create a symbol in one function:

javascriptfunction func1() {
  let sym = Symbol.for('test');
  return sym;
}

Now in another function we will retrieve this symbol by its name:

javascriptfunction func2() {
  let sym = Symbol.for('test');
  return sym;
}

Let's check that both functions contain the same symbol. We call our functions:

javascriptlet sym1 = func1();
let sym2 = func2();

And compare the symbols:

javascriptconsole.log(sym1 === sym2); // true