IntelliJ IDEA vs Nuclide vs WebStorm

Smart Code Completion;On-the-fly Code Analysis;Advanced Refactorings;Database Tools;UML Designer;Version Control Tools;Build Tools

Coding assistance for JavaScript and TypeScript; Support for React and Angular; Built-in debugger for client-side JavaScript and Node.js; Integration with build tools, linters and test runners; UI for working with Git and other VCS including a visual merge tool;

Remote development. At Facebook, our web and back-end engineers work on remote development servers in our data centers. Nuclide provides a pair of packages that allow connections over SSH to a lightweight node daemon on the server, making possible remote file editing and syntax/type validation. Of course, this also works for VMs, enabling local development on HHVM, for example.;Hack language support. The Hack codebase is one of the largest at Facebook. First-class Hack support — including syntax highlighting, type-checking, autocomplete, and click-to-symbol features — has been an important requirement on Nuclide from the start. We're also excited that the growing Hack community outside the company will be able to enjoy dedicated IDE support.;Flow support. For both local and remote JavaScript development, Flow has brought type integrity and the ability to quickly refactor our React components and apps. As it does for Hack, Nuclide supports Flow-specific decorations and editor features in @flow-annotated files.;Mercurial support. We now use Mercurial as our primary source control platform, so of course Nuclide adds support accordingly. This includes working to change highlighting in the file tree, bookmark labeling, and a read-only diff viewer — again, for both local and remote development.;Omni-search. Last but not least, this initial release includes our universal search tool package. In a large, multi-language codebase like ours, finding files and symbols quickly and efficiently is important for our engineers.