JavaScript Event Handler Welcome back.... Now, we're going deep in JavaScript. Let's learn JavaScript EventHandler . What is EventHandler in JavaScript? JavaScript Handler is a set of code that will run when user do something in the web pages, for example 'clicking' the windows or closing the windows. There a few common EventHandler Rather being too confused on that, let's practice it! 1. Alert Type 2. Input Data Input Data NB : More content will be updated... stay tuned.