jsop 
One-way data binding for JSON files
jsop is a JSON file reader/writer powered by Object.observe.
Before
var fs = require('fs')
var config = JSON.parse(fs.readFileSync('config.json'))
config.foo = 'bar'
fs.writeFile('config.json', JSON.stringify(config), function(err) {
if (err) throw err
})After
var jsop = require('jsop')
var config = jsop('config.json')
config.foo = 'bar'Changes are automatically written to file. If file doesn't exist, it will be created.
License
MIT - Typicode
* jsop is short for jsonOpen