TypeScript 中关联对象数组的接口
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Interface for associative object array in TypeScript
提问by prmph
I have an object like so:
我有一个像这样的对象：
var obj = {
key1: "apple",
key2: true,
key3: 123,
.
.
.
key{n}: ...
}
So objcan contain any number of named keys, but the values must all be either string, bool, or number.
Soobj可以包含任意数量的命名键，但值必须都是字符串、布尔值或数字。
How do I declare the type of objas an interface in TypeScript? Can I declare an associative array (or variadic tuple) of a union type or something similar?
如何obj在 TypeScript中将类型声明为接口？我可以声明联合类型或类似类型的关联数组（或可变参数元组）吗？
回答by David Sherret
Yes, you can use an index signature:
是的，您可以使用索引签名：
interface MyType {
[key: string]: string | boolean | number;
}
var obj: MyType = {
key1: "apple",
key2: true,
key3: 123
};
