Type Alias ExpandClassRecord<TClass, TKey, TAdd, TValue>

Does ExpandRecord on a property of a class. Useful for permanently casting a class's key (e.g. entries) with additional keys or more permissive entry keys.

For example:

const obj = new Entries([{key:"a"}])
// obj.entries = {a: {key: "a"}}

const expanded = obj as ExpandClassRecord<typeof obj, "entries", "b">
expanded.b // no error

const permissive = obj as ExpandClassRecord<typeof obj, "entries">

permissive.entries. // a still gets suggested
permissive.entries.anything // no error
Copy