createElement, instance in JS

const image = new Image();

 

This creates a new Image Instance in JavaScript.

It is functionally equivalent to document.createElement('img')

=> const image = document.createElement("img")

 

const IMG_NUMBER = 4 

const number = Math.floor(Math.random() * IMG_NUMBER);

Math. random ( ) => 0부터 시작한다. 

 

image.src = `images/${imgNumber + 1}.jpeg`;  => 0부터 시작해서 (0, 1, 2, 3) + 1 해서 데이터를 불러온다.