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typescript 的写法问题

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typescript 的写法问题

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请问我想约定两个字符串，其他字符串也可以，TS怎么写

这样写好像没有提示。。只要是string都可以

image.png

应该怎么写呢


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by (71.8m points)

用 enum 呀.

Demo

image.png


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