Create interface using enum keys in Typescript

Question

I want to use my enum to make an interface.

Just because one should change and the other one also needs to be changed. I want to change the code more closely.

The enum's key is the same Interface's Key.

export enum SmsReplaceKeyEnum {
  STAY_DATE = "%STAYDATE%",
  STAY_DATE_YMD = "$STAYDATEYMD%",
  ROOMTYPE_N_COUNT = "%ROOMTYPENCOUNT%",
  BOOKERNAME = "%BOOKER%",
  TOTAL_PRICE = "%TOTALPRICE%"
}

interface IPareser {
  STAY_DATE: string;
  STAY_DATE_YMD: string;
  ROOMTYPE_N_COUNT: string;
  BOOKERNAME: string;
  TOTAL_PRICE: string;
}

I also have this one

export const SmsReplaceKeyEnumKeys = [
  "STAY_DATE",
  "STAY_DATE_YMD",
  "ROOMTYPE_N_COUNT",
  "BOOKERNAME",
  "TOTAL_PRICE"
];

I tried

interface IPareser {
  [key in SmsReplaceKeyEnumKeys]: string;
}

interface IPareser {
  [key keyof SmsReplaceKeyEnumKeys]: string;
}

The final goal is to create an object's type with all the keys in the list.

Anton Sutarmin · Accepted Answer · 2019-06-02 07:55:23Z

4

You can't use mapped types syntax inside interface declaration in TS (now, up to version 3.5). You can make the desired type directly from your enum like this:

type Parser = {
  [K in keyof typeof SmsReplaceKeyEnum]: string;
}

answered Jun 2, 2019 at 7:55

Anton Sutarmin

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