Action Image Index
From Documentation
The CSS background of the action event of the DOM element is to use an arranged image composed of the following descriptions.
| Normal (Open) | Hover | Click, Select, and Drag. | Focus | Focus and Hover | Disable |
| Close | Same as above | Same as above | Same as above | Same as above | Same as above |
| Other status | Same as above | Same as above | Same as above | Same as above | Same as above |