CODEWITHSUNDEEP
typescript
koalaok
koalaok

Reputation: 5720

How to correct type typeof class has no index?

I have a typescript class with a series of static methods

 class MyClass{
   static Method01(){}
   static Method02(){}
   ...
   static Method0N(){}
 }

In some other class I get a parameter "action" and invoke:

 try{
    MyClass[action]()
 }catch(error){
     console.log(error)
 }

Linter warns me by saying:

 Element implicitly has an 'any' type because type 'typeof MyClass' has no index signature.ts

How can I skip this warning?

Upvotes: 1

Views: 29

Answers (1)

Eugene Karataev
Eugene Karataev

Reputation: 1971

You should somehow narrow your action variable to a string literal (static method name). How to achieve this depends on your use case.

const action = 'Method01';
// Or
let action = 'Method02' as const;
// Or
type Action = keyof typeof MyClass;
let action: Action = 'Method0N';

MyClass[action] // no warning

Upvotes: 1

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