A JS watcher implementation for objects, arrays, literals
If you need to catch every change made on your JS variables, this library is for you.
npm i js-watcher in your npm project directory.
The npm package is located here
proxy = require('js-watcher')
a = {a:'1', b:[1,2,3]}
p = proxy.createProxy(a, { valueChangeCallback: () => {console.log('hello')} })
p.a = 2Will print:
hello
proxy = require('js-watcher')
b = {a:{o:[1,2,3]}}
x = proxy.createProxy(b, {}, (prev, next, path) => { console.log(prev + ' -> ' + next + '; path: ' + path)})
x.a.o[0] = -1Will print:
1 -> -1; path: a.o[0]
If you want to prevent assignment of the same value to the object, you can use comparison in shouldComponentUpdate method.
proxy = require('js-watcher')
b = {a:{o:[1,2,3]}}
x = proxy.createProxy(b, {}, (prev, next, path) => { if(prev === next) return false; console.log('hello') })
x.a.o[0] = 1
x.a.o[0] = -1Will print (once):
hello
To test the implementation run: npm test
More examples on usage of this library is available at test/proxyTest.js file.