Vanilla JavaScript refers to the pure JavaScript without any additional libraries or frameworks. It is the most basic and straightforward form of JavaScript, and it is very lightweight. Vanilla JS is used to build powerful JavaScript applications and websites. The term "vanilla" is used to remind developers that many things can be done nowadays without the need for additional JavaScript libraries or frameworks. The Vanilla JS team maintains every byte of code in the framework and works hard each day to make sure it is small and intuitive. Vanilla JS is used by many popular websites, including YouTube, Yahoo, Wikipedia, and Amazon.
There are several reasons for choosing to learn and use Vanilla JS in projects. It is very basic and straightforward to learn and use. It is also one of the lightest weight frameworks ever. Additionally, using Vanilla JS can help developers avoid the complexity and overhead of using external libraries or frameworks.