回答編集履歴
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テキスト修正
test
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@@ -12,7 +12,73 @@
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に記載されている
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に記載されている下記のサンプルと同じような方法で、ご質問に挙げられている `type Color` を作成するのはいかがでしょうか？
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```typescript
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/** Utility function to create a K:V from a list of strings */
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function strEnum<T extends string>(o: Array<T>): {[K in T]: K} {
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return o.reduce((res, key) => {
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res[key] = key;
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return res;
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}, Object.create(null));
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}
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/**
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* Sample create a string enum
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*/
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/** Create a K:V */
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const Direction = strEnum([
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'North',
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'South',
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'East',
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'West'
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])
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/** Create a Type */
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type Direction = keyof typeof Direction;
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/**
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* Sample using a string enum
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*/
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let sample: Direction;
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sample = Direction.North; // Okay
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sample = 'North'; // Okay
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sample = 'AnythingElse'; // ERROR!
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```
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