Understanding AJAX Filter Behavior and User Navigation Expectations in WordPress Development
When developing custom WordPress websites, especially for freelance clients, it’s essential to consider the overall user experienceโparticularly how interactive elements behave during navigation. Recently, I encountered a scenario that highlights this point: implementing AJAX-based filters and their interaction with browser navigation, specifically the back button.
Case Study: Custom AJAX Filters and Back Button Functionality
In a project for a freelance designer client, I built bespoke AJAX filters to categorize posts dynamically. These filters were custom-coded because existing plugins did not meet the specific requirements of the project. While the filters function correctly during use, I observed an issue: after clicking on a post and then pressing the browser’s back button, the filters reset to their default state instead of preserving the previous selection.
Client Expectations and Best Practices
Interestingly, my client didnโt raise this issue upfront, which led me to question whether users inherently expect filters to retain their state when navigating using the back button. In general, web user behavior suggests that retaining filter states enhances the continuity of browsingโmaking the experience more seamless and intuitive.
Technical Considerations
Addressing this challenge is non-trivial. Preserving filter states across navigation would typically involve managing browser history states or utilizing local storage/session storage to remember user selections. Implementing such functionality can be complex and time-consumingโpotentially requiring a couple of days’ worth of work, depending on the existing codebase.
Decision-Making: To Fix or Not?
Given the scope of the fix and the current project budget, I face a strategic decision: Should I propose adding this feature as an additional service at an extra cost, or should I conclude the project as initially agreed?
Final Thoughts
While customizing features like AJAX filters, itโs vital to consider not only their core functionality but also how they interact with user navigation patterns. Transparent communication with clients about potential enhancementsโespecially those that significantly improve user experienceโcan be beneficial. Ultimately, balancing development effort, client expectations, and project scope will guide the best course of action.
If you’re working on similar features, consider planning for browser navigation states early in your development process to deliver a smoother, more intuitive experience for your users.

