pahans/reactive-modal — pull request #19 by rjsmith (2014-12-03 15:18:48+00:00)
Title: Update README.md to explain difference between 'on' and 'once' button ev...

This one tripped me up a bit. I was triggering the same ReactiveModal object in multiple callbacks in my application code, each with different 'on' button callbacks. I was seeing multiple callbacks firing when I clicked the button on the reactive modal. Finally realised that 'on' was adding additional handlers. I switched to 'once', and everything worked as expected.