freeCodeCamp/guide/english/certifications/apis-and-microservices/basic-node-and-express/get-query-parameter-input-from-the-client/index.md

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Get Query Parameter Input from the Client

Get Query Parameter Input from the Client

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Problem Explanation

Given the endpoint URL, /name?first=firstname&last=lastname, we can extract the query parameters (first and last) and their corresponding values from the req.query object and send a custom JSON response containing values derived from the query parameters to the client.

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Solutions

Solution 1 (Click to Show/Hide)

app.get("/name", function(req, res) {
  var firstName = req.query.first;
  var lastName = req.query.last;
  // OR you can destructure and rename the keys
  var { first: firstName, last: lastName } = req.query;
  // Use template literals to form a formatted string
  res.json({
    name: `${firstName} ${lastName}`
  });
});