- data structures;
- object-oriented model.
An important advantage of JS is the fact that it has syntactic similarities with Java, C++, C# and PHP. These programming languages are also actively used in their respective niches, so the novice web developer will be useful to get acquainted with them.
Are there any competitors
The main advantage of JS can be considered its stable relevance. The language appeared more than 20 years ago, but it continues to evolve. This is definitely not a technology that will be obsolete in a few years, after you have spent time learning it.
Where you can go from here