I have a config.json file:

{
  "attribute": "value"
}

When I try importing it:

import data from './config.json'

class Service1 {
    private config: Record<string, unknown> | undefined
    initConfig(data: Record<string, unknown>) {
        this.config = data
        return this.config
    }

    getAttribute(){
        const {attribute} = this.initConfig(data)
        return attribute
    }
}

I got the tslint error for the line const {attribute} = this.initConfig(data):

Argument of type '{}' is not assignable to parameter of type 'Record<string, unknown>'.
  Index signature for type 'string' is missing in type '{}'.

Why typescript considers the data as an empty object?