Hi,
You did right. To include the plugin inside themes, just include the main plugin PHP file, that's all.
This plugin doesn't have the ability to show/hide meta box with Javascript. It uses different approach:
- With Javascript, meta box is still there but hidden. Data is still be processed, which might be redundant
- In this plugin, include means meta box is visible and data is processed. Exclude means no meta box at all, so no data is processed.
Using Javascript doesn't really mean "include/exclude" :). It might be something like toggle meta box 🙂
