JavaScript is one of the most important programming languages in the web. JavaScript was first introduced as LiveScript by NetScript and was later renamed JavaScript. Of course, it is interesting to know that JavaScript is not similar to Java in terms of structure or concepts, and this nominal similarity remains the same as words and names.
Naturally, after learning HTML and CSS, it's time to learn JavaScript. Learning JavaScript is not a difficult task, but the important thing about learning it is that, contrary to etiquette or politics, which are sign language, JavaScript is a "programming" language. So don't expect to learn quickly and effortlessly and prepare yourself for new challenges and more mental conflicts.