js - symbol

Symbol : primitive type

Why intordued : diifuclt to make unique key with the help of primitive type like string , nan , undefined , number etc. Symbol helps in defining uniques key everytime it is defined

// definig String -  primitive type

let str1 = "this";

let str2 = "this";

console.log(str1 === str2);

// defining symbol - primitve type

let sym1 = Symbol("this");

let sym2 = Symbol("this");

// console.log(typeof sym1);

console.log(sym1 === sym2);