Tell me more ×  This question already has an answer here:  I'm a
new graduate, but I have been doing web development for about
six months. When I was finishing university the server side
languages (PHP, Java) were more important then client side
languages. JavaScript was only used to validate data or use AJAX
to beautify the page. The server side validation was of course
done anyways.  As I dive into more projects, I can see that
JavaScript is used a lot. It's mostly to create visual effects,
but an important part is used to convey data (JSON) and make
requests (AJAX). In a project I'm following, JavaScript takes up
30%-40% of the codebase!  My question is: "Is JavaScript that
important?".  My first impression was not good, but I also
realize that it requires skill to write good JavaScript. It
seems to be very easy to write, so it's so damn hard to manage
and very hard to identify the flow of JavaScript.  P/s: A lot of
tricks, tips, library(like JQuery) and tutorials are out there,
they are a lot but I don't