未定义defineProperty

Question

var vehicle = Object.create(null);
defineProperty(vehicle, 'transmission', "manual");

var car = Object.create(vehicle);
defineProperty(car, 'color', "red");
defineProperty(car, 'model', "subaru");

console.log(car.color);
console.log(car.model);
console.log(car.transmission);

为什么错误"ReferenceError: defineProperty未定义“

Answer 1

以下是如何使用defineProperty：

对象/对象/定义属性

Object.defineProperty(obj, prop, descriptor)