strong interfaces

[cevek]

interface IArticle {
    id?: number;
    title: string;
    anons?: string;
    text?: string;
    images?: string[];
}
class Article {
    constructor(params:IArticle) {
        /// some code
    }
}

new Article({id: 1, title: "Title", text: "Hello"});

if I rename property text? to description? in interface IArticle no error occurs
and I dont know what went wrong in my code

How about strong interfaces?

interface strong IArticle {
    id?: number;
    title: string;
    anons?: string;
    text?: string;
    images?: string[];
}

And if object with this interface has over properties then compiler will throw an error

[DanielRosenwasser]

Can you share the error you're getting and give more code to demonstrate the issue? I'm not able to reproduce any errors with your code.

I'm not sure what you mean by strong interfaces because I can't tell what they're trying to solve.

[AbubakerB]

I think what he means is that if he changes text? in IArticle to description?, then an error should be thrown at:

new Article({id: 1, title: "Title", text: "Hello" /* this doesn't thrown an error - could a strong interface solve this? */ });

Also, applying a comment to this object does something weird .... PLAYGROUND

observe the generated js code.

[cevek]

Problem is no error occurs if i rename the member text? to description? but i need to know that is may broke my application. Or other frequent example i make typo new Article({tite:123})

[NN---]

@cevek Will this code be correct in your case ?

strong interface A {
 name?: string;
}

class B implements A {
 name: string;
 other: number;
}

[RyanCavanaugh]

See #391