I realized that I have been using setTimeout() in my project -maybe- more than I should, I did a quick research and scroll through some open source react projects on Github and decided I should ask about it.

I use setTimeout mostly for changing the classname or adding styles to animate the DOM objects also using CSS transition, one point I thought it will be hard to write unit testing with this many setTimeout.

Since I came from using AngularJS, there is a $timeout service which has the same functionality with setTimeout, but in testing you can flush the timeout like $timeout.flush() and the timeout ends instantly.

My questions;

• Is there an alternative testable way that I can use instead setTimeout (logicly or programaticly)?
• Is there any builtin testable function in React does the same thing with setTimeout?
• Is there any react addons I can use for "flushable" timeout?

Keep in mind I'm fairly new at reactjs and haven't write any unit test on it yet.