@fvilers/is-function

A TypeScript type guard that validates if the given value is a function

Installation

npm install @fvilers/is-function

or

yarn add @fvilers/is-function

ECMAScript module

Starting with version 2.0.0, this library will be published as an ECMAScript module.

Usage

import { isFunction } from "@fvilers/is-function";

const variable: any = (): string => {
  return "Hello, world!";
};

if (isFunction(variable)) {
  // From here, variable is strongly typed as a function
  console.log("Variable is a function that returns", variable());
} else {
  console.log("Variable is not a function");
}

It will output:

Variable is a function that returns Hello, world!