JavaScript for Line of Business Applications

Unit testing is great: it’s the best way to see if an algorithm does the right thing every time, or to check our input validation logic, or data transformations, or any other isolated operation. Unit testing is perfect for fundamentals.

But front-end code isn’t about manipulating data. It’s about user events and rendering the right views at the right time. Front-ends are about users.

Here’s what we want to be able to do:

• Test user events
• Test the response to those events
• Make sure the right things render at the right time
• Run tests in many browsers
• Re-run tests on file changes
• Work with continuous integration systems like Travis

In the ten years I’ve been doing this, I hadn’t found a decent way to test user interaction and view rendering until I started poking at React.

Today, we’ll be building a realtime collaborative to-do application, where task status is synced in realtime across all connected devices as their state is changed. We’ll use Polymer to build our application, and PubNub to send and receive updates between connected devices, and to sync state.

Exploring ES6 …
Contains reliable and in-depth information on ECMAScript 6, the next version of JavaScript.
Is a book for people who already know JavaScript.
If you are a programmer and want to learn JavaScript (up to and including ECMAScript 5), check out Axel’s book “Speaking JavaScript” (free online).

outable Components is used to replace Controller in the component-centric model for Ember.js 2.0

This is a rough introduction to Routable components as #11939 had merged to canary. The syntax is subject to change. There are two way to use routable component, without route or with route.

Scala.js opens a big world of frontend development to Scala fans. Most of the time Scala.js project ends up being an independent browser or Node.js application. But there are cases, where you would want to make a library for general frontend developers.

There’re some interesting gotchas in writing Scala.js library such way, that it will be natural to use for an average JS developer. In this article we will develop a simple Scala.js library (code) to work with Github API and will focus on the idiomaticity of it’s JS API.

Relay is changing how we think about client side applications at Facebook. A large part of this is routing and its integration with our Hack/PHP stack. This post aims to explain why Relay in open source doesn’t have any routing features and explains solutions.

While the Flux pattern may have found a new home in JavaScript applications, they have been explored before in Domain-Driven Design (DDD) and Command-Query Responsibility Segregation(CQRS). I think it is useful to learn from these older concepts, and see what they may tell us about the present.

1. Give an overview of the Flux architecture.
2. Present the CQRS pattern.
3. Look at how Flux applies the concepts from CQRS.
4. Discuss when Flux is useful for a JavaScript application.

I recently read a post that talked about how Meteor, especially the server side, is hard to debug. I highly disagree with that statement. I actually think debugging is easier than in most languages that I've tried. Since I seem to think it is easy but others don't, it is time for a blog post to share that knowledge!

Nowadays, we have countless Javascript libraries available for us to use. Every once in a while we get a new framework/library for Javascript. I’ve used many Javascript frameworks, but I’ve never seen something as simple and flexible as Vue.js.

You’ll be amazed by how a few lines you need to write to accomplish common tasks in Javascript with Vue.js.

JavaScript Frameworks' longevity is an often overlooked yet critical ingredient in project success.

Every six months, a hot new framework hits the mainstream, and our community explodes with excitement.

Don’t believe the hype.

Framework longevity is a critical ingredient in project success. Most technology decision makers use metrics like community size, popularity, and big company support to justify their choice of framework, but these factors actually don’t predict longevity.

AngularJS is a front end JavaScript framework that has gained huge traction and popularity in the development community. TypeScript and AngularJS tutorial.

Note: This tutorial tries to stay editor independent, meaning the concepts apply to TypeScript specifically and not to an editor. When necessary, screenshots showing relevant information will be of VS Code. VS Code is a free, cross platform editor hat has excellent built in TypeScript support.