ElectronJS is a Web Development framework, that is based on JavaScript. And it could be used to build cross-platform applications by using several existing web technologies. Some of the leading examples of ElectronJS is Visual Studio Code, Atom Editor, and Slack all of these use ElectronJS. Now coming to the 2nd part of your question “Why ElectronJS is useful”. It has several benefits, that why you should try it like It has excellent code and app management, it offers code-reusability for different platforms, Electron with its one code for multiple platforms does cut down on time and money needed otherwise, it offers good performance, etc.
If you wish to master yourself in the area of Web Development, I would highly suggest you enroll in Web Development courses from Intellipaat. These courses are industry-aligned and are focused on enhancing your practical skills. Also, watch our YouTube video on Web Development from Scratch from our experts and get started.