Answers for "a javascr5ipt file name with extension"

how to get the extension from filename using javascript

var ext = fileName.substr(fileName.lastIndexOf('.') + 1);

file extension name in js

const path = require('path')

path.extname('picture.png') //.png
path.extname('picture.of.a.dog.png') //.png
path.extname('picture.of.a.dog.jpg') //.jpg
path.extname('picture.of.a.dog.jpeg') //.jpeg