TypeScript: populate JSON object with each key type in string based on the interface

Question

Is it possible to generate the Json object from interfaces populated with the key type in string? See below the interface example:

export interface shop {
    refNo: Number
    domain?: string[],    
    details: {
        name? : string,
        cui : string,
        contact?: {
            name?: string,
            phone?: string
        }[]
    }

This should be the result:

let shopObj = { 
    refNo: "Number"
    domain?: ["string"], // "Array String"   
    details: {
        name? : "string",
        cui : "string",
        contact?: [{
            name?: "string", 
            phone?: "string"
        }]
    }
}

are there any utilities that do this, does anyone have any idea how this transformation can be done from the interface?

You can use static code analysis to generate the objects you need. However, I would suggest you convert them into a standard format, like json schema. Another option is to run TypeDoc on your code using JSON output — Ruan Mendes
– Ruan Mendes, Commented Apr 28, 2021 at 14:06

Dus · Accepted Answer · 2021-04-28 13:49:12Z

0

What you're trying to do is impossible, since interfaces are types and not values, so you can't treat it as a value..

The only thing you can do, is initiate a variable and then extract the type of each field by using typeof, but its very off from what you're trying to achieve, and its very crooked and quite ugly..

answered Apr 28, 2021 at 13:49

Dus

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1 Comment

Ruan Mendes Over a year ago

You can use static code analysis to do what the OP wants.

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