Using the Proxy API to set a default value for undefined object properties

proxy-default-value.js

const defaultValueHandler = {
	get: (obj, property) => 
  	property in obj ? obj[property] : 'general kenobi'
}

const objectWithDefaultValue = new Proxy({}, defaultValueHandler);

objectWithDefaultValue.a = 'b';

console.log(objectWithDefaultValue.a); // b
console.log(objectWithDefaultValue['hello there']); // general kenobi