Angular Directives

Make Any List Draggable in Minutes

October 09, 2025

Drag-to-reorder functionality improves UX by letting users customize list order, but implementing it requires handling drag events, calculating drop positions, and managing list state. The Angular CDK Drag and Drop module simplifies this with directives that handle all drag complexity, including visual feedback, drop zones, and reordering logic. This tutorial demonstrates how to add drag-to-reorder functionality to any Angular list using the CDK Drag and Drop module, requiring minimal code and no external libraries.

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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.

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Step-by-Step: Create a Click Outside Directive in Angular

June 12, 2025

Dropdown menus and popovers need to close when users click outside them, but implementing click-outside detection requires handling event propagation, component references, and edge cases. This tutorial demonstrates how to build a reusable click-outside directive in Angular that detects clicks outside target elements, handles common bugs like immediate closure, and provides a clean API for any component that needs outside-click detection.

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Show It Once, Then Never Again… One-Time UI in Angular

May 29, 2025

One-time UI elements like onboarding banners and tooltips need to remember their dismissed state across page reloads, but managing this with component state loses persistence. LocalStorage provides persistent storage that survives browser sessions, while Angular signals enable reactive state management. This tutorial demonstrates how to build a reusable structural directive that combines localStorage persistence with signal-based reactivity, creating a one-time UI pattern you can use anywhere in your Angular application.

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exportAs in Angular: What It Does and When to Use It

May 22, 2025

Directives with public methods or signals need a way to expose their API to parent components, but accessing directive instances from templates requires explicit references. Angular's exportAs property lets you create template references to directives, enabling access to their methods, signals, and properties directly in templates. This tutorial demonstrates how to use exportAs to create reusable directives with clean, declarative APIs, following patterns used by Angular Material components.

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Angular Directive Composition API: Enhance Components with Host Directives (v19+)

March 27, 2025

Applying multiple directives to components creates verbose templates and makes it easy to forget required directives. Angular's Directive Composition API lets you embed directives directly into components, creating reusable component behaviors that can't be accidentally omitted. This tutorial demonstrates how to use host directives to add functionality like auto-focus, click-outside detection, and accessibility features directly into components, reducing template complexity and improving maintainability.

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Angular ngTemplateOutlet: Eliminate Repetitive Code in Templates

September 27, 2024

Code duplication in Angular templates creates maintenance nightmares, bloated bundles, and inconsistent UIs. When you need to update similar markup across multiple components, missing even one instance breaks the user experience. Angular's ng-template and ngTemplateOutlet solve this by letting you define reusable template fragments that can be stamped out anywhere in your app. This tutorial shows you how to eliminate repetitive code, create flexible components, and maintain consistency across your application.

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Angular computed(): Create Derived Signals from Other Signals (v19+)

August 01, 2024

Derived state is common in Angular applications—calculating totals from item prices, formatting dates from timestamps, or combining multiple signals into a single computed value. Angular's computed() function creates reactive, memoized signals that automatically update when their dependencies change, eliminating the need for manual subscriptions and improving performance. This tutorial demonstrates how to use computed() to create derived signals that stay in sync with their sources.

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Angular Host Element Binding: Replace @HostBinding and @HostListener (v19+)

July 05, 2024

Angular's @HostBinding and @HostListener decorators are deprecated, existing only for backwards compatibility. Modern Angular uses host element bindings in the component decorator and host event bindings in templates, providing better type safety, clearer syntax, and improved performance. This tutorial demonstrates how to migrate from deprecated decorators to modern host binding patterns, updating real-world examples and modernizing component code along the way.

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Angular Router Link Accessibility: Make Navigation Accessible

June 08, 2024

Inaccessible navigation links exclude screen reader users and violate WCAG guidelines, yet many Angular developers overlook basic accessibility features in router links. Angular's RouterLink directive provides built-in accessibility features including ARIA attributes, active state management, and keyboard navigation support. This tutorial demonstrates how to make breadcrumb navigation accessible using RouterLink's built-in features, ensuring all users can navigate your application effectively.

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Angular Signal Queries: Replace @ViewChild and @ContentChild the Modern Way (v19+)

April 20, 2024

Angular's traditional @ViewChild and @ContentChild decorators worked well for years, but in the signals era, they now have modern signal-based replacements. In this tutorial, you'll learn how to use signal queries to replace decorator-based queries with reactive, automatically updating references. We'll walk through both viewChild() and contentChild() in Angular v19+, explain how they behave differently from the old APIs, and show real-world examples for accessing template refs and projected content the modern way.

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Angular CDK Overlay Animations: Animate Open and Close Transitions (v19+)

January 26, 2024

Adding smooth open and close animations to Angular CDK Overlays requires Angular's animation framework. CSS transitions alone won't work because overlays are dynamically inserted and removed from the DOM. In this tutorial, you'll learn why :enter/:leave animations fail for overlays, how to use state-based animations instead, coordinate animation completion with overlay detachment, and leverage transform-origin for more natural animations. This guide builds on CDK Overlay basics, positioning, and scroll strategies. All examples work with Angular v19+.

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Angular CDK Focus Trap: Make Modals Keyboard Accessible

December 15, 2023

Focus trapping is essential for accessible modals, dialogs, and dropdowns. Without it, keyboard users can tab into content behind overlays, creating a confusing and inaccessible experience. The Angular CDK's cdkTrapFocus directive makes implementing focus traps simple, automatically managing keyboard navigation within a container and returning focus when closed. In this tutorial, you'll learn how to use the focus trap directive, enable auto-focus on open, and ensure your modals meet WCAG accessibility standards. All examples work with Angular v19+ and standalone components.

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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.

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4 Angular Class Binding Patterns You Should Actually Be Using

September 01, 2023

Conditionally adding CSS classes is one of the most common tasks in Angular, and also one of the most misunderstood. Between [class], [class.someClass], ngClass, and now modern signal-driven patterns, it's easy to end up with unreadable templates or brittle styling logic. In this article, you'll learn the four class binding patterns you should actually be using in Angular in 2025, when to use each one, and how to avoid the most common performance and readability pitfalls. All examples work with Angular v19+ and modern component patterns.

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Quick Tip - 15: How to Fix ng-cloak Flicker in AngularJS

April 18, 2014

The ng-cloak directive was added to Angular in order to prevent the flickering of elements before your application has fully loaded. It then removes ng-cloak once it has had a chance to compile your views. However, there is still a flicker issue that occurs between when the view is first loaded and before Angular has had a chance to run.

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AngularJS Overview for Web Designers

March 24, 2014

AngularJS is a newer JavaScript framework geared towards the creation and maintenance of single page web applications. It is considered to be a “toolset for building the framework most suited to your application development” meaning that, for the most part, you can choose the elements that you want to use and swap out those that you don’t want with other libraries/frameworks of your choice. It is built and maintained by Google and is open source with an MIT license.