A lot of understanding came once I understood the Angular Lifecycle Hooks and their relationship with change detection. I was trying to get Angular to update a global flag bound to the *ngIf of an element, and I was trying to change that flag inside of the ngOnInit() life cycle hook of another component. According … Read more
RC6/RC7/Final release FIX To fix this error, you just need to import ReactiveFormsModule from @angular/forms in your module. Here’s the example of a basic module with ReactiveFormsModule import: To explain further, formGroup is a selector for directive named FormGroupDirective that is a part of ReactiveFormsModule, hence the need to import it. It is used to … Read more
npm start will run whatever you have defined for the start command of the scripts object in your package.json file. So if it looks like this: Then npm start will run ng serve.
Let me preface by saying, I’m assuming you and everyone who will be reading this is already comfortably with Angular 1 (now referred to as AngularJS, as opposed to simply Angular for the newer versions). That being said, let’s get into some of the additions and key differences in Angular 2+. They added an angular … Read more
The Constructor is a default method of the class that is executed when the class is instantiated and ensures proper initialisation of fields in the class and its subclasses. Angular, or better Dependency Injector (DI), analyses the constructor parameters and when it creates a new instance by calling new MyClass() it tries to find providers … Read more
Yes, that’s it. In the app.module.ts file, I just added:
Using npm, I followed the getting started directions on the Angular CLI quick start page. Angular CLI Quickstart Running ng serve –open after creating and going into my new project “frontend” gave this error: I have tried suggestions from the other question similar to mine but it did not work. Answer was to run npm … Read more
Angular version 2+ provides several ways to add classes conditionally: type one type two and multiple option: type three type four
Install @angular-devkit/build-angular as dev dependency. This package is newly introduced in Angular 6.0 or,
@Parth Ghiya commented the answer to my question. I had to put the image to the /src/assets folder. Angular is now able to find the image.