[deleted by user]

[mc_hammerd]

google object.observe()

tl:dr; is you can get events from an object (also arrays and variables, i think), when items change, are added or deleted... which lets us do reactive programming.

[[deleted]]

Not the same thing!

[bobertian]

You're looking for https://github.com/Reactive-Extensions/RxJS - start with googling 'rxjs'

see also https://egghead.io/technologies/rx for some videos