Flapjax had behaviors, as you describe, as a key facility in a JavaScript FRP implementation, dating back to 2008: https://github.com/brownplt/flapjax/blob/f92

Flapjax had behaviors, as you describe, as a key facility in a JavaScript FRP implementation, dating back to 2008: https://github.com/brownplt/flapjax/blob/f92e99ea25a4533c4ab2c7730e82330764d59ebe/fx/flapjax.js#L482 https://github.com/brownplt/flapjax/blob/f92e99ea25a4533c4ab... I "discovered" FRP in 2011, when I stumbled upon Flapjax — spent a month pouring over the source code, learned a lot, my brain has never been the same since!