JSFiddle - React, Tailwind, and code Playground

by Liu David

JavaScript

function getFileExtension(filename) {
    return (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename)[0] : "";
}

var str1 = "a.b.jpeg";
var str2 = "_.png";

alert(getFileExtension(str1)+'\n'+getFileExtension(str2));