JSFiddle - React, Tailwind, and code Playground

by JinHan Heo

JavaScript

const comments=[
	{ id:1, body: '안녕하세요1',},
	{ id:2, body: '안녕하세요2', },
	{ id:3, body: '안녕하세요3',}
];

const newComments=[
	{ id:1, body:"10101010101010",},
	{ id:999, body:"aaa"}
];

const keys = comments.map(v => v.id)

const uniqueComments = newComments.filter(v => !keys.includes(v.id)).concat(...comments).sort((a, b) => a.id - b.id)

console.log(uniqueComments)