ReasonML Quick Start Guide

Using [@bs.deriving abstract]

CSSTransitionGroup will need the following props:

• _in
• timeout
• classNames

Since in is a reserved word in Reason, the convention is to use _in in Reason and have BuckleScript compile it to in for JavaScript using [@bs.as "in"].

BuckleScript provides [@bs.deriving abstract] for easily working with certain types of JavaScript objects. Instead of creating an object in JavaScript and binding to that object, we can create that object directly using BuckleScript:

[@bs.deriving abstract]type cssTransitionProps = {  [@bs.as "in"] _in: bool,  timeout: int,  classNames: string,};

Note: cssTransitionProps is not a record type, it just looks like one.

When using [@bs.deriving abstract], a helper function is automatically provided ...