Building web apps by following certain reactive patterns and conventions is a proven way of delivering stable and scalable software. The tool set we’ll be talking about is known under the acronym ngrx and it comprises of several sub-packages. Here I’ll refer to them simply as ‘ngrx’ but, please, take into account that there are many of them with the same prefix, like ngrx/state, ngrx/effects, ngrx/core and so on. We’ll develop a simple Angular 4.x app showing a table in master-detail design. The UI plugin used to create the table is the nice datatables.net library. The sources can be found here. A working demo […]
Angular
8 posts
The goal of this article is to describe the inner workings of an environment for WebVR components that’s based on A-Frame & Angular 2. As the design and maintenance of components like these are complex and repetitive tasks it’d be of much help to have a mechanism to offload the boilerplate like base structures, build-scripts, polyfills and other ‘usual suspects’ found in almost every web-oriented project. This is the main reason why this project exists. I wanted to have a tool-set that could not only help me create nice WebVR components but also deliver them easily by following best practices and accepted Web Standards. The […]
In the last installment we learned how to run JavaScripts over different threads by using WebWorkers. This time we’ll go a few steps further and learn how to use ServiceWorkers to achieve not only separation of code but also to build up client-side proxies. These proxies are the most important building blocks of so-called Progressive Web Apps as they allow web apps to function under rough conditions like slow bandwidths or broken connections. ServiceWorkers can also be used for push-based services or background synchronization as they run completely detached from the Browser DOM. A ServiceWorker is basically a SharedWorker with super-powers. However, the […]
In this installment we’ll write an app that retrieves data from a remote OData service and displays it in a data table. But unlike most of web apps that depend on some kind of external storage we’re not going to write the query-logic inside the app itself. Instead, we’ll outsource the data retrieval part into a separate TypeScript file that’ll constitute our WebWorker. This file will be loaded in a context separated from ‘window’ context. Our UI will be based on the nice jquery.dataTables library and just to make it somewhat more realistic we’ll implement another component, Console, for event logging. Our app’s […]
In this article we’ll learn about Angular2 Services. Our example App will contain a simple Logon-Form connected to a background Authentication-Service. This Auth-Service utilizes some of the default Angular2 mechanisms like Http, Rx/Observables etc. to provide us the needed infrastructure. Here’s a working demo for live testing. As always, the code is located on GitHub. But before we begin let’s provide a proper definition of a Service in Angular 2. What is a Service? A Service is a class annotated with @Injectable that contains some logic which can be used by different parties in the application. An Injectable doesn’t come into existence […]
In this article we’ll learn how to use the successors of former Angular 1.x filters: Pipes. As most of us know from own experience the data our apps consume is usually available in various formats that don’t fit very well to our (internal) processes. Also there are situations where we want to check some values first before going any further. And it’s not a big secret that from user’s perspective working with data via complex forms and numerous input fields would quickly become very cumbersome without all those nice little helpers like text formatters, syntax checkers, numeric converters etc. In this […]
Two weeks ago I wrote the first article for this series and I think it ended up being a chaotic bag of words filled with a myriad of different topics, examples and way too many screenshots. This happens when you learn something completely new instead of doing some more creative stuff on a weekend. Therefore, I’ll now focus this article on @Input, @Output and EventEmitter from Angular 2 rc1. Less is more and I’m planning to talk about other Angular 2 parts in further articles. But to effectively learn how to use a framework is always a question of practice than everything else […]
It’s been a while since I wrote anything here. But this blog isn’t dead or in ‘maintenance mode’. I’m just coming back from the trenches of web development and, as always, things are getting messier every day. So many new frameworks and ‘very-cool-best-practices one should follow’. However, with or without JavaScript fatigue let’s do something new and learn a few bits about the upcoming Angular 2. And just to make a few things clear: I’m not an experienced Angular developer and everything I show and explain here is based on my 2-day experience with the current Beta (today’s my second day). […]