无法理解Import/Export语句输出结果，请求技术解析

Hey there! Let me walk you through exactly what that console output means—it’s all about how modern JavaScript gets transformed for broader browser compatibility.

First off, what you’re seeing is Babel-transpiled ES5 code that corresponds to the ES6 class component you wrote as Cperson. Back when ES6 classes were new, many browsers didn’t support them natively, so tools like Babel convert class syntax into older, compatible ES5 function-based code. Here’s a breakdown of each part:

• Cpersons() { ... }: This is the transpiled constructor function for your component. (Note: The name Cpersons instead of Cperson might be a typo in your code, a transpiler quirk, or a minification step—either way, it’s the core function representing your component class.)
• _classCallCheck(this, Cpersons): This is a helper function Babel adds to enforce ES6 class rules. It makes sure you’re creating an instance of Cpersons using the new keyword (which is required for classes). If you tried to call Cpersons() directly without new, this check would throw an error to prevent bugs.
• _possibleConstructorReturn(this, (Cpersons.__proto__ || Object.getPrototypeOf(Cpersons)).apply(this, arguments)): This handles the inheritance logic from React.Component:
  • First, it gets the prototype of Cpersons (using Object.getPrototypeOf as the standard method, with __proto__ as a fallback for older environments).
  • Then it calls the parent class’s (React.Component) constructor using apply, passing in the current instance (this) and any arguments passed to your component.
  • The _possibleConstructorReturn helper ensures the final instance is correct: if the parent constructor returns an object, it uses that object; otherwise, it uses the current this—matching how ES6 class inheritance works.

In short, that console output is just the "under-the-hood" version of your Cperson component class, converted to work in environments that don’t support ES6 classes natively.

内容的提问来源于stack exchange，提问作者user9726696