
Being open-source, it is hackable to the core.
To optimize Atom for JavaScript coding, install the JavaScript package.
Atom: Atom text editor is developed by GitHub and is highly customizable, allowing you to install packages easily. Some features that users love include - GoTo anything to open files with few keystrokes, GoTo definition to generate a project-wise index, multiple selections, command palette, powerful API and package ecosystem, easily customizable, split editing, instant project switching, and is available across all platforms. It utilizes a customized toolkit that is created to achieve speed and elegance. Sublime Text: It’s a sophisticated next-generation text editor with a slick UI, extraordinary features, and top-notch performance. All the important features are already baked in and provide immense support in managing the files. You can easily use extensions to add new languages, install debuggers, themes, etc. It supports syntax highlighting, has an auto-complete feature backed up by IntelliSense (provides smart completion), function definitions, tons of plugins, etc.
Visual Studio Code: Visual Studio is, hands-down, the most popular IDE, not only for JavaScript and JQuery but for all the popular programming languages.