December 11, 2018

Using git hooks to keep your codebase clean

Problem Let’s be honest – developers tend to be lazy. Whenever you start a new project you’re probably saying to yourself that you want to do everything better this time but often times your new project becomes the same mess as your previous one. I want to introduce a neat little trick that might help […]
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theCodeCampus Autor Kai Henzler

Kai Henzler
Developer at thecodecampus </>


December 3, 2018

Nested Forms in Angular

This Article is based on Kara Ericksons talk about “Angular Forms” at the Angular Connect 2017. https://www.youtube.com/watch?v=CD_t3m2WMM8&amp=&index=15 I am going to give you a quick example to get started with nested Forms. TL;DR Extract the HTML in new Component Inject ControlContainer in new Component Access the Form via ControlContainer.control pass the parent Form into the […]
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theCodeCampus
Developer at thecodecampus </>


December 2, 2018

Material 2: Sticky Footer with Mat Sidenav

My guess is your using Angular in combination with Angular Material and you desperately need a sticky footer, ideally, in a variable height. No need to look any further. This article will provide you with a basic solution for given circumstances. This article was updated and tested for Angular 7 and Material 2 Version 7.1.1 […]
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theCodeCampus Autor Christian Heitmann

Christian Heitmann
Developer at thecodecampus </>


November 27, 2018

Improve performance with virtual scrolling in Angular – HowTo

Since the release of Angular 7, the Angular CDK includes a feature that can improve the performance of your application dramatically. Virtual scrolling is highly beneficial for dealing with a lot of data in tables or lists. You can improve performance for large lists in Angular with the Angular CDK virtual scrolling component. What is […]
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theCodeCampus Autor Kai Henzler

Kai Henzler
Developer at thecodecampus </>


November 21, 2018

Call a method on @Input() change

Problem You probably already run into this issue. Inside a component, you want to react to the change of an @Input() value e.g. by calling a method of your component. For example we have get an @Input() filter: string from our parent component and if the @Input() changes, we want to update our data in […]
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theCodeCampus
Developer at thecodecampus </>


November 20, 2018

Building an Angular App in parallel for multiple languages

Problem When using the built-in Angular Internationalization (i18n) the Angular guide tells you in detail what you have to do to set up your application to support multiple languages. The guide lacks the details on how to properly integrate the build into a common web application deployment workflow. In this brief blog post I’m going to […]
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theCodeCampus Autor Kai Henzler

Kai Henzler
Developer at thecodecampus </>


October 5, 2018

Angular 2 – Set Class of parent element with @HostBindings

With the @HostBinding() annotation, Angular gives you a useful tool to handle manipulations of css classes of parent Elements. The advantage is quite clear, the required logic remains in the components class and is not set in the template file. This makes it easier to test and improves the readability of the template file. In […]
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theCodeCampus
Developer at thecodecampus </>


July 26, 2018

Locally serving the build distribution of an Angular SPA

tl;dr Use Node Package local-web-server and its command ws with the spa flag like this: ws --spa index.html While developing an Angular based SPA usually you will use the Angular CLI as build too. The CLI has an integrated development server which is able to handle client-side routing. So whenever a reload happens and you’re […]
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theCodeCampus
Developer at thecodecampus </>


July 18, 2018

Angular, Preserving Query Params and Google AdWords

… and how all this leads to an incorrect source of traffic in Google Analytics and incorrect conversion attribution.   The situation is as follows: On www.thecodecampus.de we run an Angular 6 page. We advertise our product with Google AdWords. If a visitor comes via Google AdWords, the URL is appended with a glcid and several […]
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theCodeCampus
Developer at thecodecampus </>


March 2, 2018

The ‘this’ context of type ‘void’ is not assignable to method’s ‘this’ of type ‘Observable<{}>‘.

If you are experiencing this error – usually something with your RxJS imports is wrong. So you should go through them manually or simply delete all imports from RxJS in the corresponding file and let the IDE generate them again. Something broken could look like this:

Better working might be:

What is happening? RxJS […]
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theCodeCampus
Developer at thecodecampus </>