known

Allow only access to known object properties using ES2015 Proxy

Usage

$ npm install known

const known = require('known');

const object = {foo: true};

console.log(object.bar);
//=> undefined

const object2 = known(object);

// Throws a TypeError when you try to access an unknown property
console.log(object2.bar);
//=> [TypeError] Unknown property: bar

Related

• on-change - Watch an object or array for changes (Uses Proxy too)
• negative-array - Negative array index support (Uses Proxy too)

License

MIT © Sindre Sorhus