Conditional Content

Teleport a Component in Angular (and Keep Its State)

September 18, 2025

Moving components to different DOM locations in Angular typically destroys component state because Angular recreates views when templates change. The Angular CDK DomPortal provides a solution by moving live DOM elements without destroying component instances, preserving state, event listeners, and component lifecycle. This tutorial compares three approaches: ng-template with ngTemplateOutlet, CDK Template Portal, and CDK DomPortal, showing when each preserves state and when components get recreated.

Angular Angular Components Angular Directives

One Slot? Two Slots? Conditional Slots? Solved.

July 10, 2025

Multi-slot content projection in Angular enables flexible component APIs, but managing multiple slots, conditional projection, and fallback content requires understanding Angular's content projection system. This tutorial demonstrates how to create components with multiple named slots, handle conditional content projection, provide fallback content when slots are empty, and conditionally render the same slot in different locations based on component state.

Accessibility Angular Angular Components

Angular Content Toggle: Show/Hide Content with Buttons

September 06, 2024

Building toggle buttons in Angular doesn't have to be complicated. Whether you need to show/hide content with CSS classes or conditionally render elements, this tutorial covers multiple approaches. You'll learn how to create reusable toggle buttons that control content visibility, handle state management with signals, and implement smooth transitions. By the end, you'll have several patterns you can use in any Angular project.

Angular Angular Components Angular Directives

Angular Control Flow: Replace ngIf, ngFor, and ngSwitch the Modern Way (v19+)

November 03, 2023

Angular's new control flow syntax replaces the old structural directives (*ngIf, *ngFor, and ngSwitch) with a cleaner, more intuitive template syntax that doesn't require imports or wrapper elements. In this guide, you'll learn how to use @if, @for, and @switch to build modern Angular templates, understand when and why to migrate from the old directives, and discover the performance benefits of built-in tracking. All examples work with Angular v19+ and demonstrate production-ready patterns.

Conditional Content

Teleport a Component in Angular (and Keep Its State)

One Slot? Two Slots? Conditional Slots? Solved.

Angular Content Toggle: Show/Hide Content with Buttons

Angular Control Flow: Replace *ngIf, *ngFor, and ngSwitch the Modern Way (v19+)

Angular Control Flow: Replace ngIf, ngFor, and ngSwitch the Modern Way (v19+)