Efficiently Count and Group Checkbox Selections by Data Attributes Using Vanilla JavaScript

Learn how to effectively count and group selected checkboxes in HTML by their `data-section` attributes using plain JavaScript without jQuery.
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Efficiently Count and Group Checkbox Selections by Data Attributes Using Vanilla JavaScript

Checkboxes are a common component in web forms, allowing users to make multiple selections. However, counting those selections and grouping them by specific attributes can be a bit tricky. If you're looking to efficiently count and group checkbox selections by their data-section attributes, you're in the right place. Let’s dive into how you can achieve this seamlessly without relying on jQuery.

Understanding the Problem

You might already have a set of checkboxes that you want to monitor for changes. The aim here is to count how many checkboxes in each data-section are checked and present that data in a structured manner, such as in an object. For example, if your HTML contains multiple checkboxes with varying data-section values, you would like to see an output that looks like this:

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

This output clearly indicates how many checkboxes are selected in each section. So, how can we implement this?

The Solution

Step 1: Create an Object to Store Counts

Instead of using jQuery, we'll utilize native JavaScript functionality. First, create an object that will hold the counts of each section. You'll initialize the counts to zero when setting up the checkboxes:

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

Step 2: Update Counts on Checkbox Changes

Next, you need a function that responds to changes in the checkbox selection. This function will check if a checkbox is checked or not and update the counts accordingly:

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

Complete Example in HTML

Here's how you can implement this in your HTML code. Below is a complete and functional example incorporating the JavaScript logic previously discussed:

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

Conclusion

By utilizing plain JavaScript, you streamline your code, avoiding the overhead of jQuery while efficiently handling checkbox selection data. This method not only helps you count the checkboxes by their respective data-section attributes but also provides a robust solution for any form of data monitoring you may require in the future.

Now you have a clear, organized, and effective way to count and group checkbox selections without unnecessary dependencies. Get started with coding, and watch your form functionality improve!