The Mastering the Arcane Art of JavaScript-mancy series are my humble attempt at bringing my love for JavaScript to all other C# developers that haven’t yet discovered how awesome this language and its whole ecosystem are. These articles are excerpts of the super duper awesome JavaScript-Mancy book a compendium of all things JavaScript for C# developers.

Welcome back! Today we will make a summary of the different ES2015 features related to functions that we’ve seen and worked with so far in the series: destructuring, default arguments and rest parameters. This will help you to consolidate these new features in your mind and also dive into them a little bit deeper.

We will also take a look at the new arrow function and how it solves the this conumdrum that we discussed in chapter 1 and will end up discussing smaller features like let, const and the spread operator.

{% img center comic—rotated-right /images/javascriptmancy-es2015-functions.png “ES2015 and functions” “ES2015 and functions” %}

The Mastering the Arcane Art of JavaScript-mancy series are my humble attempt at bringing my love for JavaScript to all other C# developers that haven’t yet discovered how awesome this language and its whole ecosystem are. These articles are excerpts of the super duper awesome JavaScript-Mancy book a compendium of all things JavaScript for C# developers.

In the last couple of articles we learned some useful patterns with functions in JavaScript that helped us achieve default arguments and multiple arguments and we saw how ECMAScript 2015 (ES6) can simplify the way we can incorporate either of these in our code.

Today I will close this section - useful function patterns - with some tips on how you can achieve function overloading in JavaScript. Hope you like it!