打字稿：交集键入任何对象和选项

Question

我想用任何道具制作类型，选项必须是数字

type PropsWithOption = object & {option?:number}
const props:PropsWithOption = {anyProp1:'',anyProp2:'',option:5}

但是，这会出错并且 PropsWithOption 类型应该是空对象或只有选项 {} 的对象 {option:number}

我该如何解决？

谢谢

type PropsWithOption = object & {option?:number}
// I tried below codes also, but they throws same errors 
// type PropsWithOption = Object & {option?:number}
// type PropsWithOption = {} & {option?:number}
const props:PropsWithOption = {anyProp1:'',anyProp2:'',option:5}

Answer 1

你应该使用Index Signatures

type PropsWithOption = {
  option?: number;
  [prop: string]: any;
};

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