apply-changes

Take a changes array in the format produced by Object.observe and Array.observe, and apply those changes to another object.

$3

``js

var apply = require('apply-changes')

var localUser = {
name: 'Original'
}

var remoteUser = {
name: 'Original'
}

Object.observe(localUser, function(changes) {
apply(remoteUser, changes)
console.log(remoteUser.name) // 'Updated'
console.log(localUser.name === remoteUser.name) // true
})

localUser.name = 'Updated'

`

$3

Say you have an environment where Object.observe is implemented (e.g.
node 0.11.x), and you want to easily replicate changes to another environment
perhaps one without Object.observe (e.g. vintage
2013 web browser). In this scenario, you could send a raw stream of changes
directly from Object.observe callback to observe-apply to have
changes applied in the other environment.

Caveats

The recipient of the changes must be treated as read-only.
apply-changes` does not verify the state of recieving object matches the state
of source object. Updates are likely to corrupt data if you change the recipient
object.

Licence

MIT