ECMAScript 6 Proxy Object with default property value

README.md

Don't even ask...

It seemed like a cool idea. I am not actually using this for anything.

node --harmony run.js

1
17
3
17
17

ObjectWithDefaultValue.js

module.exports = exports = ObjectWithDefaultProperty;
function ObjectWithDefaultProperty(properties, defaultValue) {
  return Proxy.create({
    get: function get(proxy, name) {                       
      if (name in properties) {
        return properties[name];
      } else {
        return defaultValue;
      }
    }
  });
}

run.js

var ObjectWithDefaultProperty = require('./ObjectWithDefaultProperty');

var properties = {a: 1, c: 3},
    defaultValue = 17,
    proxy = new ObjectWithDefaultProperty(properties, defaultValue);

console.log(proxy.a);
console.log(proxy.b);
console.log(proxy.c);
console.log(proxy.d);
console.log(proxy.e);