How to Easily Translate jQuery to Pure JavaScript

Struggling to convert jQuery code to JavaScript? This guide walks you through the process, helping you understand how to utilize pure JavaScript for functions like `.not` and `.filter`.
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Solving the Translation Puzzle: From jQuery to JavaScript

Converting jQuery code to plain JavaScript can seem daunting, especially when you encounter methods like .not() and .filter(). If you’ve spent hours trying to figure it out, don’t worry! In this guide, we'll break down the translation process, ensuring you have a clear understanding of how to achieve the same functionality using pure JavaScript.

Understanding the Problem

You might be dealing with a common situation where you have jQuery code that you need to rewrite in JavaScript. In this case, the code involves clicking on elements and filtering a list of images based on their data attributes. Your goal is to replicate the functionality without relying on jQuery.

The Original jQuery Code

Here’s an overview of the jQuery code you’re starting with:

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

This code filters a list of image boxes based on the clicked element’s data-filter attribute. The challenge comes in translating the .not() and .filter() logic into pure JavaScript.

Step-by-Step Translation to JavaScript

Let’s break down the solution into manageable sections so you can follow along easily.

1. Setting Up Event Listeners

Instead of using .click(), we’ll use addEventListener. This allows us to listen for click events on each element in our .list collection.

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

In this code, we select all elements with the class .list and attach a click event listener to each.

2. Filtering Image Boxes

Next, we need to replicate the filtering functionality of jQuery. Instead of .not() and .filter(), we can achieve this using forEach and classList:

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

Here, we check if the filter value is 'All' or if the image box contains the relevant class. If either condition is true, we display the image box; otherwise, we hide it.

3. Handling Active Classes on List Items

In your original jQuery code, you added an active class to the clicked list item. We'll do this in pure JavaScript by modifying the class list directly:

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

This adds the active class to the clicked item and removes it from its siblings.

Complete JavaScript Code

Bringing it all together, your final translated code would look something like this:

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

This code accomplishes the same goal as your jQuery version but uses pure JavaScript.

Exploring Additional Features

While the code above rewrites the core functionality, it’s worth mentioning that the original jQuery code animated the transitions with .show() and .hide(). To simulate this in vanilla JavaScript, you’ll need to implement CSS transitions.

Adding CSS Transitions

You could define a class that applies a transition effect for showing and hiding elements. For example:

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

By toggling the hidden class in your JavaScript, you can create a smooth fade effect.

Conclusion

Translating jQuery code to pure JavaScript can be a challenge, but with a clear understanding of how functions like .not() and .filter() work, it can be done seamlessly. By breaking down the code step-by-step and using event listeners effectively, you can achieve the same functionality without the overhead of jQuery.

Keep experimenting with JavaScript, and you’ll find it becomes second nature! Happy coding!