JavaScript Recipes: A Problem-Solution Approach

© Russ Ferguson and Keith Cirkel 2017

Russ Ferguson and Keith Cirkel, JavaScript Recipes, 10.1007/978-1-4302-6107-0_12

12. Working with Functions

Russ Ferguson¹  and Keith Cirkel²

(1)Ocean, New Jersey, USA

(2)London, UK

How Do You Create a Function?

Problem

You want to know how many ways there are to create a function.

Solution

There are three ways to create a function, using a constructor, declaration, or expression.

The Code

Listing 12-1. Creating a Function

//function constructor                                                                  var fun1 = new Function('name', 'return name;');fun1('Jessica');//function declaration                                                                  function myFun(name){    var greeting = 'Hello ' + name;    return greeting;}myFun('Danny');//function expression                                                                  var fun3 = function(name) {    return name;}fun3('Mami');

How It Works

There are ...