How can I optimize the structure of an object that contains nested objects in Typescript to minimize type repetitions?
type itemType = {
[key: string]: {
[key: string]: { [key: string]: { [key: string]: string } };
};
};
How can I optimize the structure of an object that contains nested objects in Typescript to minimize type repetitions?
type itemType = {
[key: string]: {
[key: string]: { [key: string]: { [key: string]: string } };
};
};
Here is an example of how you can achieve this:
type itemNode<D, Depth extends any[] = []> =
Depth extends {length: D}
? never //Stop when we hit desired depth
: {
[index: string]: itemNode<D, [...Depth, true]>
}
type testItem = itemNode<4>
//=>
type testItem = {
[index: string]: {
[index: string]: {
[index: string]: {
[index: string]: never;
};
};
};
}
This method utilizes conditionals and recursion. It defines a recursive type that appends a tuple to each layer as it goes deeper, stopping once the desired depth is reached.
You can view and explore this code further on TS Playground
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