CODEWITHSUNDEEP
typescript
Exegesis
Exegesis

Reputation: 1078

Typescript Declare Class Type

In Javascript I have:

var session = require('express-session');
var SequelizeStore = require('connect-session-sequelize')(session.Store);
new SequelizeStore({
    db: sequelize
});

I set these types:

function ConnectSessionSequelize(store: expressSession.IBaseStore): expressSession.IBaseStore;

This fails because expressSession.IBaseStore refers to an instance type, not a class type. Is there a way to specify class types, similar to Java: Class<expressSession.IBaseStore>?

Currently I'm using function CoSeSe(store: Function): Function, but this has major type leakage!

Upvotes: 1

Views: 322

Answers (1)

Ryan Cavanaugh
Ryan Cavanaugh

Reputation: 220904

The syntax typeof SomeClass will give you the type of the constructor function SomeClass (e.g. the type of x if you wrote let x = SomeClass) rather than the instance side (e.g. the type of y if you wrote let y = new SomeClass()).

Upvotes: 2

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