Modal Component

[eddywashere]

First run at applying fade classes to a component. Modal has a fade in for backdrop and modal content. Added a Fade component to help with toggling classes from .fade to .fade.in via state.

Modal Props

• isOpen
• toggle
• onExit - called after exit
• onEnter - called after enter

Modal Header Props

• toggle - adding this enables close button

[eddywashere]

@cbfx merging as is, definitely up for responding to feedback in another issue/pr.