let str1 = 'hello'
let str2 = 'hello'
let strObj1 = new String('hello');
let strObj2 = new String('hello');

console.log(str1 === str2) // true

console.log(str1 == strObj1) // true
console.log(str1 === strObj1) // false

console.log(strObj1 == strObj2) // false