Typescript decorator template

typescript_decorator_template.ts

function decoratorTemplate<
  decoratedClassType,
  decoratedMethodResponseType,
  decoratorResponseType,
>(
  _target: object,
  key: string | symbol,
  descriptor: TypedPropertyDescriptor<
    (...originFnArguments: object[]) => decoratedMethodResponseType
  >
): TypedPropertyDescriptor<
  (...originFnArguments: object[]) => decoratorResponseType
> | void {
  const originalHandler = descriptor.value!;
  descriptor.value = function (
    this: decoratedClassType,
    ...originFnArguments: object[]
  ) {
    // pre-apply actions

    // call original function
    const originalHandlerResponse = originalHandler.apply(this, [
      ...originFnArguments,
    ]);
    // post-apply actions

    return originalHandlerResponse;
  };
}