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It depends on what your javascript code does. Most of the javascript code that is difficult to reproduce is tied to something it expects from a web server such as JSON/XML/HTML data. … The customers can design the product the way they want it and the controls on the website rely heavily on javascript. …

Here are some questions that should get you going on JavaScript. How does JSON work and what is it good for? Why are functions objects in Javascript? Why shouldn't I use eval? … How do I create events in javascript? How do I feature detect in javascript? Pretty much covers most things you need to do in Javascript. …

This is because variables are function scoped in JavaScript. So it doesn't matter how many times you var it in a function, it will be the same variable. …

Is it possible to create [a Single Page Application] that doesn't rely on JavaScript, without being difficult, or full of "hacks"? … If you're working with sites where disabled javascript/css is a requirement then SPA is probably not the best option for you. …

It is de facto internet standard to use javascript libraries, most of them are well documented by now and most web developers (who know javascript) know how to use them. … You don't really give up javascript when using a library. You still need to know Javascript with it's types, objects, how closures work, etc. …

The scope to which elements knockout binds itself with is determined from the way you call ko.applyBindings. It takes two parameters, an object to be used as the root view model and an element to "app …

If I was relearning JavaScript I'd be thankful if I knew about closures earlier; or rather using functions as parameters in other functions. …

It is basically the observer pattern implemented in Javascript, and instead how most pub/sub frameworks are implemented, the "key" is the subject itself instead of an arbitrary object. … The usage is as follows: // the subjects // plain old javascript object with observable values var shipComponent = { velocity : observable(0) }; // the observer, a player user interface // implemented …

a framework (such as mootools Class.Class) Generate it from Coffeescript In the beginning I tended do write class based code in Javascript and heavily relied on it. … But are there any of them applicable for a prototype-based language such as Javascript? Are there any principles or patterns that are just specific to Javascript? …