Is there ArgumentsType like ReturnType in Typescript?

Question

ReturnType extracts return type of a function.

Is there a way to define ArgumentsType that extracts parameter types of a

Answer 1

Expanding on @Titian Cernicova-Dragomir's answer, if you are using named function expressions, thus not being able to define a type, you can access the parameters with typeof like so:

function updateTable(
  diff: Diff,
  cache: { [id: string]: Table> & IHasOBJECT_ID & IHasCONFLICTS & IHasOPTIONS },
) {
  // Use typeof to get the parameter type for cache
  const cacheItem: Parameters[1] = cache[diff.id];

  // ...
}