JSFiddle - React, Tailwind, and code Playground

JavaScript

// 데이터의 선언 방식(리터럴, 객체)
var num1 = 10;
var num2 = new Number(10);

var str1 = '안녕';
var str2 = new String('안녕');

var boo1 = true;
var boo2 = new Boolean(true);

var arr1 = [1, 2, 3];
var arr2 = new Array(1, 2, 3);


// check value
console.log(`num1 == num2 -> ${num1 == num2}`);
console.log(`num1 === num2 -> ${num1 === num2}`);
console.log('------------------------------------');
console.log(`str1 == str2 -> ${str1 == str2}`);
console.log(`str1 === str2 -> ${str1 === str2}`);
console.log('------------------------------------');
console.log(`boo1 == boo2 -> ${boo1 == boo2}`);
console.log(`boo1 === boo2 -> ${boo1 === boo2}`);
console.log('------------------------------------');
console.log(`arr1[0] == arr2[0] -> ${arr1[0] == arr2[0]}`);
console.log(`arr1[0] === arr2[0] -> ${arr1[0] === arr2[0]}`);