Defining an array of string to string map in typescript-CodePudding

I have an interface that accepts { [key:string]: string }. I want to test several cases for it. For this I want to define an array containing my test cases as follows:

const tests: [ {[key: string]: string} ] = [{
  "A": "B"
}, {
  "C": "D"
}]

But it will not compile because Typescript is assuming those inline objects are types in of themselves.

Type '[{ A: string; }, { C: string; }]' is not assignable to type '[{ [key: string]: string; }]'. Source has 2 element(s) but target allows only 1.

CodePudding user response：

This is not how you type arrays of a particular type in TypeScript. The following gives no errors in the playground:

const tests: {[key: string]: string}[] = [{
  "A": "B"
}, {
  "C": "D"
}]

CodePudding user response：

It should be like this:

const tests: {[key: string]: string}[] = [{
  "A": "B"
}, {
  "C": "D"
}]

Doing it like you did, [{[key: string]: string}], means it should be an array with one object inside.