How to locate files in webstorm nodejs require

i dont know how else to ask this question but please bare with me a second, im struggling to understand how to locate a file in webstorm node js, what i mean by that is how do i know when to use ../ or ./ or even ..// i dont get these i want to understand it well. for example what is happening here is it starting from the top folder or:

var Schema = require('./.services/.router.js');

before you flag my question or close it down i did really search else where but i havent found any useful resources .

./ means you want to access your current directory

../ means you want to access first subdirectory of current directory

For example: when in /home/my/directory/ the ../ will get you into /home/my/