Created
December 31, 2017 12:18
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let j = { | |
a: 1 | |
}; | |
// Upon change, save to server | |
let changeable = onChange(j, () => save(j)); | |
// Make a change that would trigger changes | |
changeable.a = 2; | |
// save() is triggered! | |
// j.a === 2; |
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'use strict'; | |
module.exports = (object, onChange) => { | |
const handler = { | |
get(target, property, receiver) { | |
try { | |
return new Proxy(target[property], handler); | |
} catch (err) { | |
return Reflect.get(target, property, receiver); | |
} | |
}, | |
defineProperty(target, property, descriptor) { | |
onChange(); | |
return Reflect.defineProperty(target, property, descriptor); | |
}, | |
deleteProperty(target, property) { | |
onChange(); | |
return Reflect.deleteProperty(target, property); | |
} | |
}; | |
return new Proxy(object, handler); | |
}; |
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