What you need to know about variable scope What is a user-defined variable in JavaScript? All JavaScript programming happens in an environment like a web browser, Node, or Bun.js.

Method and variable handles vs. Java reflection To truly understand MethodHandles and VarHandles —what they do and why they are useful—it’s helpful to know a few things about reflection in Java.

The javascript file contains a method addToViewer (theUrl), I need to get the variable 'url' from the servlet into this method.