Filter Table Rows in Pure JavaScript with a Dropdown Selection

Learn how to hide table rows based on selected dropdown options using pure JavaScript. Discover a simple approach to filtering your HTML table data effectively!
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How to Filter Table Rows in Pure JavaScript with a Dropdown Selection

In modern web development, creating dynamic user interfaces is key to enhancing user experience. One common feature is the ability to filter table data based on user selections from a dropdown. In this guide, we will explore how to hide specific table rows based on dropdown options using pure JavaScript.

The Challenge

Let’s consider a situation where you have an HTML form that adds input to an HTML table. You want to provide users with an intuitive dropdown to filter information in the table, displaying only the relevant rows based on their selection. For instance, if a user selects "Anna" from the dropdown, they should see only Anna's associated row in the table.

Here’s a simplified version of the table structure we're working with:

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

The dropdown might look like this:

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

Our goal is to hide rows in the table based on the selection made in the dropdown.

Solution Overview

Here’s how to achieve this using pure JavaScript:

Access the dropdown and table elements: We will select the dropdown and the table rows.

Add an Event Listener: Detect any changes made to the dropdown selection and trigger the filter function.

Filter the Rows: Based on the selected value, we will loop through the table rows and hide those that do not match the selected name.

Step 1: Accessing Elements

First, we need to get references to the dropdown and all table rows. We can do this as follows:

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

Step 2: Adding an Event Listener

Next, we’ll listen for changes to our dropdown. When a selection is made, we will call our filtering function:

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

Step 3: Filtering the Rows

In the filterTableRows function, we check the selected value of the dropdown against the first cell of each table row. If they match or if the "All" option is selected, we display that row; otherwise, we hide it.

Conclusion

By implementing the steps outlined above, we can create a fully functional table row filter using JavaScript. This feature enhances the user experience by allowing users to quickly find the information they need without having to scroll through the entire table.

Final Thoughts

Keep in mind that as your user interface grows, utilizing data structures like JSON for better data management or exploring libraries that handle data manipulation may help streamline your code and improve maintainability.

Now that you understand how to filter table rows based on dropdown selections, give it a try in your projects! Happy coding!