Discussion on: Why using JS classes instead of Typescript interfaces?

[Rico Brase]

Usually in Typescript, interfaces are used to describe the structure of an object, just as in your example.

classes usually contain actual behaviour code in them. In default configuration (strict: true), Typescript will complain about

class Post {
  title: string;
}

with the following error message:

Property 'title' has no initializer and is not definitely assigned in the constructor.

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Additionally, interfaces are purely used in type-checking, since they don't exist in Javascript - they don't get any compilation output! If you create a post.ts file and fill it with your example code from above, your compiled post.js file will only contain

class Post {
}