Express routing, middleware, request and response objects, error handling, REST conventions, validation and authentication basics.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What does Express do?
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Framework for building web applications with Node.js- What is routing in Express?
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Mapping HTTP requests to handler functions based on method and path- What does app.listen() do?
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Starts the server and listens for incoming requests on a specified port- What is a handler function?
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Function that receives req and res objects and processes a request- How do you define a GET route?
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app.get(path, handler)- How do you define a POST route?
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app.post(path, handler)- How do you define a PUT route?
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app.put(path, handler)- How do you define a DELETE route?
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app.delete(path, handler)- What are route parameters?
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Named URL segments prefixed with a colon, like /users/:id- How do you access route parameters?
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Through the req.params object- What are query parameters?
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Key-value pairs appended to a URL after a question mark- How do you access query parameters?
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Through the req.query object- What does req.body contain?
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Parsed data sent in POST or PUT request bodies- What does req.headers contain?
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HTTP headers sent by the client- What does req.method return?
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The HTTP verb of the incoming request (GET, POST, etc.)
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