TypeScript, type for json response Object in Object[]

Question

I have the response from API. I need processing that response and get values from that. I can understand which type I should use for that. Also when I tried this.filters[key] I fetched error

Element implicitly has an 'any' type because index expression is not of type 'number'.ts(7015)

My object from response:

"OneType": {
    "OnePart": {
        "Values": [
            "codes..",
            "codes..",
            "codes..",
            "codes.."
        ],
        "Values2": [
            "codes..",
            "codes..",
            "codes..",
            "codes.."
        ]
    },
    "SecondPart": {
        "Values": [
            "codes..",
            "codes..",
            "codes..",
            "codes.."
        ],
        "Values2": [
            "codes..",
            "codes..",
            "codes..",
            "codes.."
        ]
    }
}

I tried make type, but still have a error about key.

type FilterArray = { [key: string]: [] };

The error in VSCode

I want to note that each value can have multiple values, like the first one (OneType, TwoType...) and (FirstPart / Second/ third..)

Answer 1

So, I found the solution. Everything can be easy.

We make JSON type and if we want to get an object by key we can use:

type JSONValue =
    | string
    | number
    | boolean
    | JSONObject
    | JSONArray;

interface JSONObject {
    [x: string]: JSONValue;
}

interface JSONArray extends Array<JSONValue> { }

Receive:

const myObject: JSONArray = {
 first: {
     second: {
       third: ['1','2']
     }, 
     secondSecond: {
       ...
     },
   ...
 }
};
const result = myObject[key as keyof JSONValue];