This bachelor thesis looks and investigates the developers knowledge about JavaScript and more specifically ECMAScript 2015. JavaScript is a very popular programming language and can be used to create web applications, desktop applications and even fully functional SQL-databases. When the interest for JavaScript in general rises it becomes more and more important to really know that the community implements and adapts to what is specified by the ECMA committee, since they have members from different very large companies around the world i.e Microsoft and Google. This research displays the immense update of ECMAScript will inspire the reader to further his knowledge of ECMAScript 2015 and what the features are of it.

We are doing this by conducting a survey amongst developers that are currently studying in the field or are working in the field to get a grip on how the knowledge is regarding the most common ECMAScript 2015 features. What we saw was that the result are very positive about ECMAScript 2015 and the new features helps solving actual problems that the community are facing. We also found that some of the features may enhance the readability and maintainability though some may not enhance it.