Angular

Angular features, testing with Jasmine/Karma, and migration guides.

10 articles

• Angular Unit Testing with Jasmine and Karma: A Practical Guide

  How Angular unit testing fits together — TestBed, Jasmine, and Karma — plus code coverage, testing pipes, and testing attribute directives, with examples.

  July 21, 2026

• Auto-Migrate Angular Templates to @if / @for: The control-flow Schematic

  Angular ships a schematic that rewrites *ngIf and *ngFor to the new @if and @for control flow automatically. The command, what it does (and doesn't) handle, and how to run it safely per-directory.

  December 10, 2023

• Angular Control Flow (@if / @for / @switch): Syntax, track, and Why It's Faster

  Angular's built-in control flow — @if, @for, @switch — replaces *ngIf and *ngFor. Correct syntax (including the mandatory track and the @empty block), why it needs no CommonModule, and the interview points.

  December 10, 2023

• New Features in Angular 17: A Comprehensive Guide

  Angular 17's headline changes: built-in @if/@for/@switch control flow, deferrable views with @defer, and the automatic migration schematic. A full guide.

  December 10, 2023

• Angular @defer: Lazy-Load Template Blocks with Triggers (@placeholder, @loading, @error)

  Angular's @defer block lazy-loads part of a template on a trigger — viewport, interaction, idle, hover or timer — keeping non-critical content out of the initial bundle. Correct syntax, every trigger, prefetching, and the SEO caveat.

  December 8, 2023

• Custom Filter in AG Grid (Angular): A Complete IFilterAngularComp Example

  Build a custom AG Grid filter in Angular by implementing IFilterAngularComp — agInit, isFilterActive, doesFilterPass, getModel/setModel — and registering the component on the column. Correct, complete, runnable code.

  May 21, 2023

• Testing Angular Pipes with Jasmine & Karma: Pure, Dependency-Injecting, and In-Template

  How to unit test Angular pipes with Jasmine/Karma. Pure pipes need no TestBed — instantiate and assert on transform(). Plus testing pipes that inject dependencies, parameterised pipes, and pipes used inside a component template.

  October 13, 2022

• How To Write Unit Tests For Angular Attribute Directives

  Test Angular attribute directives with a standalone host component, TestBed, By.directive, input changes, and assertions for default and bound behavior.

  October 12, 2022

• How to excludes files from Angular Unit test code coverage

  How to excludes mock files from ng test --code-coverage

  October 5, 2022

• Angular Unit Test Code Coverage with Karma

  Generate Angular code coverage with ng test --code-coverage, read the HTML report, enforce thresholds in karma.conf.js, and exclude files that shouldn't count.

  October 4, 2022

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