JSDoc
JSDoc is a markup language and tool used to document JavaScript code by adding structured comments directly in the source files. It parses these comments to generate API documentation in HTML or other formats, helping developers understand code functionality, parameters, and return types. It is widely adopted in the JavaScript ecosystem for maintaining clear and consistent documentation.
Developers should use JSDoc when working on large or collaborative JavaScript projects to improve code readability, facilitate onboarding, and enable better IDE support through type hints and autocompletion. It is particularly useful for documenting libraries, APIs, and complex functions where explicit documentation reduces errors and enhances maintainability.