How to use the watch.watch.apply function in watch
To help you get started, we’ve selected a few watch examples, based on popular ways it is used in public projects.
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timoxley / react / index.js View on Github 
Emitter(target)
}
var onWatch = function(prop, action, newValue, oldValue) {
target[prop] = newValue
target.emit('change', prop, newValue, oldValue, action) // generic 'change'
target.emit('change ' + prop, newValue, oldValue, action) // reactive compatible
}
// properties is optional and we only want to spply `watch`
// with them if they are present.
var args = []
args.push(source)
properties && args.push(properties)
args.push(onWatch)
args.push(1)
watch.apply(undefined, args)
return target
}
