React 函数式组件与经典组件 [英] React functional components vs classical components

问题描述

我试图了解何时使用 React 功能组件与类并阅读 docs 他们并没有真正详细介绍.您能否给我提供以下一些主要示例，说明您何时需要类的特定功能来制作组件?

I'm trying to understand when to use React functional components vs. classes and reading from the docs they don't really go into detail. Can you give me some primary examples of the below of when you would want a specific feature of a class to make a component?

函数式组件不那么强大但更简单，就像一个只有一个 render() 方法的类组件.除非你需要仅在类中可用的功能，我们鼓励您使用功能代替组件.

A functional component is less powerful but is simpler, and acts like a class component with just a single render() method. Unless you need features available only in a class, we encourage you to use functional components instead.

推荐答案

你只需要一个 class 组件，当你:

You only need a class component when you:

• 需要组件 state 或
• 需要生命周期方法.如componentDidMount 等

• need the component state or
• need the lifecycle methods. such as componentDidMount etc.

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