Mastering the Use of JavaScript in Angular 12

Learn how to effectively integrate `JavaScript` into your `Angular 12` project, replacing traditional DOM manipulation with Angular's reactive approach for innovative designs like side navigation.
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This video is based on the question https://stackoverflow.com/q/68653975/ asked by the user 'sgitdev83' ( https://stackoverflow.com/u/7392465/ ) and on the answer https://stackoverflow.com/a/68660199/ provided by the user 'danday74' ( https://stackoverflow.com/u/1205871/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering the Use of JavaScript in Angular 12: A Complete Guide

If you're stepping into the world of Angular 12 and trying to integrate JavaScript for tasks such as creating a sidebar navigation, you might find the transition challenging, especially if you're used to traditional DOM manipulation methods. For instance, the snippet you shared involves classic JavaScript approaches like document.querySelectorAll, which don’t align well with Angular's robust framework that encourages a more reactive and component-based architecture.

In this guide, we’ll walk through the process of properly implementing a sidebar in Angular 12 without relying on traditional JavaScript methods and without using Angular Material's CSS styles.

Understanding the Problem

You want to create a sidebar using Angular 12 without resorting to Angular Material and its styles. You attempted to implement this functionality using plain JavaScript but found difficulty integrating it into your Angular component. The main challenge is that traditional JavaScript event listeners and DOM manipulation methods clash with Angular's declarative nature.

Transitioning to Angular's Reactive Approach

Instead of manipulating the DOM directly with JavaScript, Angular provides a more elegant solution. Here’s how you can recreate the functionality you're looking for:

Step 1: Setting Up the HTML Structure

First, let’s create the sidebar and the toggle button in your Angular component's HTML file.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Defining the Logic in TypeScript

Next, we need to include the logic that will manage the visibility of the sidebar in your TypeScript file.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Styling the Sidebar

Finally, we can style the sidebar in your component’s CSS file. This is crucial to ensure that your sidebar looks and feels as you desire, without pulling in any unwanted styles from Angular Material.

[[See Video to Reveal this Text or Code Snippet]]

Summary

By transitioning from traditional JavaScript to a more component-based approach in Angular, you gain several benefits:

Cleaner Code: It abstracts away complex DOM manipulation into simple, declarative templates.

Better Performance: Angular manages the DOM efficiently, which helps in optimizing performance.

Key Takeaways:

Use Angular's (click) event binding instead of JavaScript event listeners.

Utilize property binding (like [class.show-me]) to manage dynamic class applications.

Always keep your logic in your TypeScript files and use CSS for styling.

By following these steps, you’ll create a clean, responsive sidebar using Angular 12 without resorting to Angular Material. Embrace the Angular way, and you will find it immensely rewarding!

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