Guide on transforming JSON data into a collection of custom objects using TypeScript

When working with raw data in TypeScript (originally a JSON file and imported using

import * as raw_data from './json_file.json'
):

let raw_data: object = {"a": {"name": "Name a", "desc": "Description a"}, "b": {"name": "Name b", "desc": "Description b"} }

I need to extract a map of keys (as strings) and the custom objects defined by the interface AnObject:

interface AnObject {
    name: string;
    description: string;
}

How can I achieve this in TypeScript?

I've attempted:

let myObject: Map<string, AnObject> = raw_data as Map<string, AnObject>;

and also

let myObject: Map<string, AnObject> = <Map<string, AnObject>>raw_data

but have been unsuccessful so far. The object remains as an object and myObject.size returns undefined.

Answer №1

When making type level modifications, keep in mind that an object is not the same as a Map after transpilation. To handle this correctly, create it as shown below:

let myObject: Map<string, AnObject> = new Map(Object.entries(raw_data));

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