在JavaScript中显示Node对象：为何Object.Node返回undefined？

Great question! Let’s break this down clearly:

• Node is a global DOM interface, not a property of the Object constructor. In browsers, all built-in DOM interfaces (like Node, Element, Document) live on the global window object. When you write console.log(Node) directly, you’re actually accessing window.Node under the hood—this works because it’s part of the browser’s DOM API.

• Object is a separate built-in constructor focused on JavaScript object operations. It has its own static properties and methods (like Object.keys(), Object.assign(), or Object.prototype), but it doesn’t include DOM-related interfaces as direct properties. While Node does inherit from Object.prototype (since nearly everything in JS is an object at its core), that prototype chain relationship doesn’t mean Node is stored as a property of the Object function itself.

To confirm this, try running these lines in your browser console:

console.log(window.Node); // Same result as just `Node`—it exists!
console.log(Object.hasOwnProperty('Node')); // Returns false—Object has no such property

Think of it like this: Object is a toolbox for working with plain JS objects, while Node is a separate tool for interacting with DOM nodes. They’re both available in the global "workshop" (the window object), but one isn’t stored inside the other.

内容的提问来源于stack exchange，提问作者Sami Kh