Hello again! It’s a historic week here at AppSignal! This week we released the first version of our new and improved JavaScript error monitoring. Now you can have your front end code, Ruby or Elixir back end code, your hosts, performance, everything monitored in one interface. To celebrate the launch, in a two-part series of posts, we’ll be taking a look at the history of Errors in JavaScript, including how to handle them in your code today.

Good news, everyone! Today, we’re proud to announce the launch of our fully-fledged JavaScript error tracking for your front-end applications. From today, you’ll have even more complete insights into your Ruby and Elixir apps — your back-end errors, performance metrics, host metrics, custom metrics and your front-end errors can now all come together under a single interface.

Today, we will dive into Typespecs and Behaviours. These are two Elixir features that we are ecstatic (pun intended) about. They are great examples of built-in features in Elixir that help get some of the advantages of statically typed code. Alright, let’s set the scene. Elixir is a dynamically typed language. This means that the type of each variable is not checked at compile-time, but rather at run-time. Like most things, this comes with advantages and disadvantages.