Adds Observer support for the given object el or if the argument is empty a new observable instance is created and returned. After this the object is able to trigger and listen to events. For example:
function Car() {
// Make Car instances observable
observable(this)
// listen to 'start' event
this.on('start', function() {
// engine started
})
}
// make a new Car instance
var car = new Car()
// trigger 'start' event
car.trigger('start')@returns the given object el or a new observable instance
Listen to the given event and execute the callback each time an event is triggered.
// listen to single event
el.on('start', function(args) {
})
// listen all the events of this observable
el.on('*', function(event, param1, param2) {
// event will be the name of any event triggered
// do something with the parameters
})@returns el
Listen to the given event and execute the callback at most once
// run the function once, even if 'start' is triggered multiple times
el.one('start', function() {
})@returns el
Removes the given event listeners.
el.off('start')@returns el
Removes the given callback listening to the event
function doIt() {
console.log('starting or ending')
}
el.on('start', doIt)
// remove a specific listener
el.off('start', doIt)@returns el
Removes all listeners from all event types.
@returns el
Removes the specific callback function called on all the events
@returns el
Execute all callback functions that listen to the given event.
el.trigger('start')
el.trigger('render')@returns el
Execute all callback functions that listen to the given event. Any number of extra parameters can be provided for the listeners.
// listen to 'start' event and expect extra arguments
el.on('start', function(engine_details, is_rainy_day) {
})
// trigger start event with extra parameters
el.trigger('start', { fuel: 89 }, true)@returns el