delegable-proxy

Multi-level deepened proxy, works sync.

Main purpose

For convenience sake we want to work with common lists and objects but keep track of every change to commit them to the underlying storage. Object.observe() and Array.observe() are pretty much the exact thing we want, but both work async via polling.

The proxy returns the type of mutation (add, del, mod) and which position (in root object) is affected.

Example

import DelegableProxy from 'delegable-proxy'

const example = [{'message': 'hello world'}]
const data = DelegableProxy.wire(example, (action, pos) => {
  console.log(action, pos)
})
data.push({'message': 'hi there!'})
data.push({'message': 'knock knock!'})

RunKit

https://runkit.com/586ca4b68acd620014d54362/586ca4b68acd620014d54363

Known issues

• The way Array.splice works, leads to a lot of mutations on inner arrays. Better use the slow delete foo[42].bar.stuff[0].
• We do not recommend to use this library in a production environment. This was just a fun project, some kind of PoC for us. We still use it in a dev environment which is only used internally.

Usage

# add the library
yarn add delegable-proxy

# build the library
yarn build

# run the tests
yarn test