<script>

     function w(wcon) {

         console.log(wcon)

     }

     w(Symbol)

     w(Symbol())

     w(Symbol("foo") !== Symbol("foo"))

     //true

     const foo = Symbol()

     w(foo)

     const bar = Symbol()

     typeof foo === "symbol"

     w(typeof foo === "symbol")

     //true

     var sym = Symbol("<3");

     // "your symbol is " + sym

     // Uncaught TypeError: Cannot convert a Symbol value to a string

     w(String(sym))

     //Symbol(<3)

     w(sym.toString())

     //Symbol(<3)

     w("your symbol is " + String(sym))

     //your symbol is Symbol(<3)

     w("your symbol is " + sym.toString())

     //your symbol is Symbol(<3)

 </script>