javascript - Some questions about object property descriptors and prototypes in JS

Question

Define an object and get the descriptor of a certain attribute: for example

let obj = {name: 'Andy'};
let descriptor = Object.getOwnPropertyDescriptor(obj, 'name');

The Object here should be a constructor. Why can the getOwnPropertyDescriptor method be called? Hope you can enlighten me

Answer 1

getOwnPropertyDescriptor is a static method

Answer 2

Object is the top-level object of JavaScipr!

In js, there are two concepts: prototype and prototype chain. Instance objects only have prototype chains, while function objects and objects have their own prototypes.
Function objects and objects are the two top-level objects of JavaScipr, whether they are functions Whether instantiated objects, custom objects, array objects, etc., their prototypes are based on these two.

Answer 3

This object is an object

Answer 4

function Template () {
    // 在用 new 操作符 调用的时候，这就是构造函数
};

Template.staticMethod = function() {
    // 静态方法
};
Template.prototype.instanceMethod = function() {
    // 实例方法
};

This should not be difficult to understand
ObjectThe implementation principle is the same