This web page is inspired by the www.freecodecamp.org article: JavaScript One-Liners to Use in Every Project
The freecodecamp article only aims to show the code (and that's fine) and doesn't address how it might be applied, so in my learning path I try to show how these functions and concepts might be applied in a way that you can interact with them and see them working in a practical way. In some cases I have used the sample code exactly as it is in the article, and in other cases I have changed and added other things to make the example work.