regie

An observable state management tool for vanilla JS applications based on Proxies

Example

const regie = require('regie')

const initialState = {
  items: []
}

const { state, observe } = regie({ initialState })

observe(state.items, (newValue, change) => {
  console.log(`new value is ${newValue} with change:`, change)
})

state.items.push('first!')

Installation

npm i regie

Usage

observe function accepts many forms, including a string path and a predicate. All of the following are the same:

const regie = require('regie')

const initialState = {
  items: []
}

const { state, observe } = regie({ initialState })

observe(state.items, handler)
observe(state => state.items, handler)
observe(() => state.items, handler)
observe('items', handler)

const items = state.items

observe(items, handler)
observe(() => items, handler)

regie also allows you to watch primitive values in a certain form. The following examples observe the future first element of the array:

observe(() => state.items[0], handler)
observe('items.0', handler)

and the following examples observe even farther into the future details of the first element of the array:

observe(() => state.items[0].name, handler)
observe('items.0.name', handler)

License

MIT License

Copyright (c) 2019 Armagan Amcalar

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.