Creating JSON objects in Typescript

You can store the json in variables of class any but usually you will want to have some typing on these object so what I usually do is having a fromJson static method on my model classes that will instantiate an object from a json like that:

class User {

    public firstname: string;
    public lastname: string;
    public age: number;

    constructor() {
    }

    public static fromJson(userJson: any): User {
        var user = new User();

        this.firstname = userJson.firstname;
        this.lastname = userJson.lastname;
        this.age = userJson.age;

        return user;
    }
}

If one of your properties is a class you can also have a from json on it and embed it in the from json like that:

class User {

    public firstname: string;
    public lastname: string;
    public status: Status;

    constructor() {
    }

    public static fromJson(userJson: any): User {
        var user = new User();

        this.firstname = userJson.firstname;
        this.lastname = userJson.lastname;
        this.status = Status.fromJson(userJson.status);

        return user;
    }
}

Hope it helps