typescript 打字稿中的通用对象类型
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/40641370/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Generic Object type in typescript
提问by Nahush Farkande
In typescript is there any way to assign a variable a generic object type. Here's what I mean by 'generic Object type'
在打字稿中有什么方法可以为变量分配一个通用对象类型。这就是我所说的“通用对象类型”的意思
let myVariable: GenericObject = 1 // Should throw an error
= 'abc' // Should throw an error
= {} // OK
= {name: 'qwerty'} //OK
i.e. It should only allow javascript objects to be assigned to the variable and no other type of data(number, string, boolean)
即它应该只允许将 javascript 对象分配给变量而不是其他类型的数据（数字、字符串、布尔值）
回答by Nitzan Tomer
Sure thing:
肯定的事：
type GenericObject = { [key: string]: any };
let myVariable1: GenericObject = 1; // Type 'number' is not assignable to type '{ [key: string]: any; }'
let myVariable2: GenericObject = 'abc'; // Type 'string' is not assignable to type '{ [key: string]: any; }'
let myVariable3: GenericObject = {} // OK
let myVariable4: GenericObject = {name: 'qwerty'} //OK
（操场上的代码）
回答by JaredMcAteer
Typescript 2.1+ also has has a utility type, Record<K, T>, you can use instead of making your own definition
Typescript 2.1+ 也有一个实用程序类型, Record<K, T>，你可以使用而不是自己定义
const myObj: Record<string, any>;
I like to use the style described in top answer when I can give a meaningful name to keybut if it's not really as obvious or necessary Recordis a great option.
当我可以给出一个有意义的名字时，我喜欢使用 top answer 中描述的样式，key但如果它不是那么明显或必要的话，这Record是一个很好的选择。
回答by Bill Barnes
As of TypeScript 2.2 you can use
从 TypeScript 2.2 开始，您可以使用
let myVariable: object;
Edit: Here's an example:
编辑：这是一个例子：
let myVariable: object = { fun: 1 };
回答by Josh Leslie
A bit of a tangent since I haven't found a similar answer elsewhere, from @JaredMcAteer here, using recordhelped me with mixing enums + objects.
有点切线，因为我没有在其他地方找到类似的答案，来自 @JaredMcAteer 在这里，使用record帮助我混合了枚举 + 对象。
enum FOO_ENUM {
BAR = 'BAZ';
}
type FOO_OBJECT_TYPE = { ... };
const BIZ_OBJECT: Record<FOO_ENUM, FOO_OBJECT_TYPE> = {
[FOO_ENUM.BAR]: { ... }
}
Where before I was typing BIZ_OBJECTasBIZ_OBJECT: {[type: string]: FOO_OBJECT}
which allowed something like BIZ_OBJECT.asd, now only a key from FOO_ENUMcan be used, e.g.
在我输入BIZ_OBJECTasBIZ_OBJECT: {[type: string]: FOO_OBJECT}
允许类似的地方之前BIZ_OBJECT.asd，现在只能使用一个键 from FOO_ENUM，例如
BIZ_OBJECT.BAZ // { ... }BIZ_OBJECT.asd // Property 'asd' does not exist on type ...BIZ_OBJECT[FOO_ENUM.BAR] // { ... }BIZ_OBJECT[FOO_ENUM.asd] // Property 'asd' does not ...BIZ_OBJECT[FOO_ENUM['asd']] // ! not caught !
BIZ_OBJECT.BAZ // { ... }BIZ_OBJECT.asd // Property 'asd' does not exist on type ...BIZ_OBJECT[FOO_ENUM.BAR] // { ... }BIZ_OBJECT[FOO_ENUM.asd] // Property 'asd' does not ...BIZ_OBJECT[FOO_ENUM['asd']] // ! not caught !
