JAVASCRIPT

what is symbol in javascript

Symbol is a primitive data type of JS along with string,number,bool,null and undef
which are used to identify object properties since none is equal to the other.

Symbol Methods javascript

// get symbol by name
let sym = Symbol.for('hello');
let sym1 = Symbol.for('id');

// get name by symbol
console.log( Symbol.keyFor(sym) ); // hello
console.log( Symbol.keyFor(sym1) ); // id

javascript Symbol Methods

for()	Searches for existing symbols
keyFor()	Returns a shared symbol key from the global symbol registry.
toSource()	Returns a string containing the source of the Symbol object
toString()	Returns a string containing the description of the Symbol
valueOf()	Returns the primitive value of the Symbol object.

JavaScript Symbol

// two symbols with the same description

const value1 = Symbol('hello');
const value2 = Symbol('hello');

console.log(value1 === value2); // false

Symbol Methods javascript

// get symbol by name
let sym = Symbol.for('hello');
let sym1 = Symbol.for('id');

// get name by symbol
console.log( Symbol.keyFor(sym) ); // hello
console.log( Symbol.keyFor(sym1) ); // id

JavaScript Symbol

// two symbols with the same description

const value1 = Symbol('hello');
const value2 = Symbol('hello');

what does the symbol function do in javascript

var idk={test:true,[Symbol.toStringTag]:'e'}
consoel.log(idk)//e {test:true,[Symbol.toStringTag]:'e'}
idk.toString()//[object e]