本文介绍了如何从 TypeScript 中的枚举值构建类型?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
鉴于以下内容:
enum FooKeys {
FOO = 'foo',
BAR = 'bar',
}
我想制作一个这样的界面,但不是手动定义键,而是使用枚举的值构建它.
I'd like to make an interface like this one, but instead of defining keys by hand, build it out of enum's values.
interface Foo {
foo: string
bar: string
}
TypeScript 可以实现类似的功能吗?
Is something like this possible with TypeScript?
谢谢!
推荐答案
是的,您可以使用枚举值作为键.您可以使用映射类型,就像标准库的记录
防止重复:
Yes, you can use enum values as keys. And you can use a mapped type like the standard library's Record<K, V>
to prevent repetition:
enum FooKeys {
FOO = 'foo',
BAR = 'bar',
}
// probably all you need, but it's a type alias
type FooType = Record<FooKeys, string>;
// if you need an interface instead you can do this
interface FooInterface extends FooType {};
您可以验证它是否有效:
And you can verify that it works:
declare const foo: FooInterface;
foo.foo; // okay
foo[FooKeys.FOO]; // okay
foo.bar; // okay
foo[FooKeys.BAR]; // okay
foo.baz; // error
这对你有用吗?祝你好运!
Does that work for you? Good luck!
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