JS Code convert to Typescript

Question

I need to convert the following code into TypeScript. It is an array with objects. and then I want to use it inside a class. I tried to use an interface but I could not proceed much. Please help me.

var accountModel = {
        name: 'ABC Account',
        accounts: [
            { balance: 10000, description: 'Checking' },
            { balance: 50000, description: 'Savings' }
        ]
    };

Your help is very much appreciated.

Answer 1

If you want type checking on your account model data, you can use type aliases

type AccountModel = {name:string, accounts:Array<Account>}
type Account = {balance:number, description:string}

Now your IDE will check if your variable has the correct content:

let acc : AccountModel = {
        name: 'ABC Account',
        accounts: [
            { balance: 10000, description: 'Checking' },
            { balance: 50000, description: 'Savings' }
        ],
        test: 'hello' // The IDE will complain: 'test' is
                      // not assignable to accountModel
 };