Get JSON Value with Dynamic Key in TypeScript

#typescript #json #snippet #beginners

Small and hopefully helpful snippet.

Scenario: You have an on going update of JSON of Car data which has modelyear being added regularly. You wanted to output model description base on year as an input.

// Get JSON Value with dynamic key
const vehicle = {
    "category": "car",
    "brand": "SupaDupa",
    "modelYear": {
        "2000": "SD-S",
        "2020": "SD-M",
        "2030": "SD-A",
        "2040": "SD-R",
        "2050": "SD-T"
        }
}
type ObjectKey = keyof typeof vehicle.modelYear;
const year = '2020' as ObjectKey // set value of dynamic key
console.log(vehicle.modelYear[year])