{"library":"dat-middleware","type":"library","category":null,"description":"dat-middleware is an Express.js middleware library that provides a fluent and declarative API for common request data operations. It focuses on validating and transforming `req.body`, `req.query`, and `req.params` against various criteria such as required fields, data types (string, number, array, boolean, object, function), specific class instances (`instanceOf`), and regular expressions (`matches`). Developers can also integrate custom validation logic using the `validate()` method. Upon validation failure, the middleware automatically calls `next()` with a 400 Bad Request error object generated by `spumko/boom`, simplifying error handling. The current stable version is 1.10.4. Given its last update several years ago, it operates primarily in a maintenance mode, offering a stable but not actively developed solution for Express input validation. Its key differentiator is the chaining syntax for defining validation rules directly within the middleware stack.","language":"javascript","status":"maintenance","version":"1.10.4","tags":["javascript","express","middleware","request","response","body","query","params"],"last_verified":"Wed May 27","install":[{"cmd":"npm install dat-middleware","imports":["const mw = require('dat-middleware');","const Boom = require('dat-middleware').Boom;","app.use(mw.body('key').require());"]},{"cmd":"yarn add dat-middleware","imports":[]},{"cmd":"pnpm add dat-middleware","imports":[]}],"homepage":null,"github":"https://github.com/tjmehta/dat-middleware","docs":null,"changelog":null,"pypi":null,"npm":"https://www.npmjs.com/package/dat-middleware","openapi_spec":null,"status_page":null,"smithery":null,"compatibility":{"summary":{"python_range":"18–22","success_rate":0,"avg_install_s":null,"avg_import_s":null,"wheel_type":null},"url":"https://checklist.day/v1/registry/dat-middleware/compatibility"}}