go 2 folders out and the go an folder in in html code example

Example 1: javascript reference file two folders up

//.. selects the parent directory from the current. Of course, this can be chained:

../../index.php
//This would be two directories up.

Example 2: import file 3 directories back

//Current Directory
./index.js

//One Directory Up
../index.js

//Two Directories Up
../../index.js