Building a Lightweight Product Filter with Vanilla JavaScript

Short summary

A beginner-friendly tutorial showing how to build a product filter using HTML data attributes and vanilla JavaScript, with no external libraries. The approach uses data-* attributes on product cards and click listeners on filter buttons to show or hide items by size. A CSS transition adds polish. The author argues this lightweight pattern is sufficient for smaller storefronts and is easy to extend with additional filter groups.

• •Product cards store metadata in HTML data-* attributes; filter buttons toggle visibility via vanilla JS
• •No external libraries or frameworks needed — zero dependencies and easy debugging
• •Pattern is extensible to multiple filter groups, search, sorting, and price ranges

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