[英]What's the difference between passing undefined or pass nothing at all on component state definition?
例如，我有两个代码：
export class Component extends React.Component<ComponentProps, undefined>
和
export class Component extends React.Component<ComponentProps>
它们的主要区别是什么？ 如果没有输入未定义，它是否接受任何 state？
传递组件到声明或指令有什么区别？
[英]What is the difference between passing component to declarations or to directives?
打字稿：可选字段与未定义的联合有什么区别？
[英]Typescript: What's the difference between an optional field and a union with undefined?
在函数中，内联返回类型和在单独的类型定义中定义的返回类型之间有什么区别？
[英]In a function, what's the difference between an inlined return type and the return type defined in a separate type definition?
React＆TypeScript-`React.Component`和`typeof React.Component`有什么区别
[英]React & TypeScript - what's the difference between `React.Component` and `typeof React.Component`
React.FunctionComponent 和普通的 JS 函数组件有什么区别？
[英]What's the difference between a React.FunctionComponent and a plain JS function component?
导出一个组件和在另一个模块中导入它的模块有什么区别？
[英]what's the difference between exporting a component and importing its module in another module?
如何在Angular中未嵌套的组件之间设置或传递属性状态
[英]How to set or pass a property state between unnested component in Angular
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