WP Shifty Review

With WP Shifty you can define complicated rulesets - scenarios - too easily, to specify where the configured rules need to be applied. You may very easily combine the conditions, but can also use all the condition types like an exception.

With WP Shifty you can disable plugins for particular scenarios. With this feature, you can decrease bloated CSS & JS, reduce execution time, reduce TTFB, and decrease the number of database requests. Also, with WP Shifty scenarios you can set very complex rules, and even disable plugins by post type, device, user role, etc. 

With WP Shifty you can delay loading particular CSS or javascript files. Both CSS & JS can be loaded slowly, however you can set embedded scripts to defer or async. Lazyloaded scripts and styles will be loaded only on the user interaction: when the visitor moves the mouse, clicks to an element, starts scrolling, or touches the touchscreen. WP Shifty focuses on optimizing resources, however, with the load behavior features you may fine-tune the load priorities.

You can also inject arbitrary HTML code to any pages (both on the front end of admin) at the beginning/end of the head/footer or after the styles in the head. You can add an extra CSS or javascript only on the specific pages.

Preloading important static files may highly improve the Web Vital scores. You can preload JS, CSS, video, audio, images, and documents as well. And also you can add media queries, and preload the right sizes/version for various devices.