# ParamFn Decorator operation input

Module
import { ParamFn } from "@tsed/common"
Source/packages/common/src/mvc/decorators/params/paramFn.ts

# Overview

function ParamFn(fn: (param: ParamMetadata, parameters: DecoratorParameters) => void): <T>(target: Type<any>, propertyKey: string, index: number) => void;

# Description

Get the Param metdata. Use this decorator to compose your own decorator.