对象类型(Object types)在 JavaScript 中,最基本的将数据成组和分发的方式就是通过对象。在 TypeScript 中,我们通过对象类型(object types)来描述对象。对象类型可以是匿名的:function greet(person: { name: string; age: number }) { return "Hello " + person.name;} 也可以使用接口进行定义:interface...
let mySquare= createSquare({ colour: "red", width: 100 });//Argument of type '{ colour: string; width: number; }' is not assignable to parameter of type 'SquareConfig'.//Object literal may only specify known properties, but 'colour' does not exist in type 'SquareConfig'. Did you ...
age: 25, gender: 'male'}; // examples/playground/index.ts(9,5): error TS2322: Type '{ name: string; age: number; gender: string; }' is not assignable to type 'Person'.// Object literal may only specify known properties, and 'gender' does not exist in type 'Person'....
you could runtsc --noCheckwhile iterating, and thentsc --noEmitfor a thorough type check. You could also run the two tasks in parallel, even in--watchmode, though note you’d probably want to specify a separate--tsBuildInfoFilepath...
本章节官方文档地址:Object Types 对象类型 在JavaScript 中,最基础的分组和传递数据的方式就是使用对象。在 TypeScript 中,我们则通过对象类型来表示。 正如之前看到的,对象类型可以是匿名的: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 functiongreet(person:{name:string;age:number}){return"Hello "+pe...
interfacePerson{name:string;age?:number;}lettom:Person={name:'Tom',age:25,gender:'male'};// examples/playground/index.ts(9,5): error TS2322: Type '{ name: string; age: number; gender: string; }' is not assignable to type 'Person'.// Object literal may only specify known properties...
在JavaScript 中,最基本的将数据成组和分发的方式就是通过对象。在 TypeScript 中,我们通过对象类型(object types)来描述对象。 对象类型可以是匿名的: functiongreet(person:{name:string;age:number}){return"Hello "+person.name;} 也可以使用接口进行定义: ...
// Object literal may only specify known properties, and 'gender' does not exist in type 'Person'. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 可见,赋值的时候,变量的形状必须和接口的形状保持一致。 可选属性 有时我们希望不要完全匹配一个形状,那么可以用可选属性: ...
Object literal may only specify known properties, but 'colour' does not exist in type 'SquareConfig'. Did you mean to write 'color'? 1. 2. 3. 如果看过前面的文章的话,上面的代码应该会很容易理解。注意传入createSquare的参数拼写为colour而不是color。 在JavaScript里,这会默默地失败。
// Object literal may only specify known properties, but 'raidus' does not exist in type 'Colorful & Circle'. Did you mean to write 'radius'? # 接口继承与交叉类型(Interfaces vs Intersections) 这两种方式在合并类型上看起来很相似,但实际上还是有很大的不同。最原则性的不同就是在于冲突怎么处理...