How To Write Javascript In Java. By the end of this post, you will know: Let us say your jsfunctions.js file has a function display and this file is stored in c:/scripts/jsfunctions.js.

Javascript is the programming language of the web. Here importing multiple javascript files into a single javascript file and calling that master javascript file from a function. Javascript functions are reusable blocks of code that perform a specific task, taking some form of input and returning an output.