Is it possible for TypeScript to recursively infer the type of an object's keys and its children's keys? Consider the following scenario:
const o:A<X> = {
a:'1',
b: {
c: '2'
}
}
If we define A so that X is "a"|"b"|"c", TypeScript can currently only infer the first layer (i.e. X = "a"|"b") using keyof. How can we make TypeScript infer the key types of the grandchildren nodes as well?
Here is a suggestion for you:
define A<T extends string|number> = {
[key in T]?: string | A<T>
}
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