jsdoc generator tool — Documenting JavaScript Legacy Codebases

Legacy JavaScript and Node.js repositories often suffer from missing or outdated documentation. A jsdoc generator tool like Legacy Doc-AI automates the creation of JSDoc-style comments, improving IDE support, type inference, and team onboarding.

How Legacy Doc-AI Generates JSDoc Comments

The CLI analyzes your codebase's abstract syntax tree (AST) to identify functions, parameters, return types, and callbacks. It then generates standardized JSDoc blocks with @param, @returns, @throws, and @callback tags. This process preserves existing code while adding structured documentation that editors like VS Code can read.

Sample Output from nock Library Analysis

When applied to the nock HTTP mocking library, the tool produced documentation like this:

/**
 * Intercepts and mocks outgoing HTTP requests.
 *
 * @param {string} scope - The URL scope to intercept.
 * @param {Object} [options] - Optional configuration.
 * @param {boolean} [options.allowUnscoped=false] - Allow requests outside scope.
 * @returns {Interceptor} The mock interceptor for chaining.
 */
function intercept(scope, options = {}) {
  // ... implementation
}

Comparison to Manual JSDoc Writing

Manual documentation is precise but time-consuming. For a repo with 500+ functions, writing JSDoc by hand can take weeks. With a jsdoc generator tool, you get initial documentation in minutes. The output provides a starting point that developers review and refine, combining automation speed with human oversight.

See more examples at samples.html.