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Send a JSON or JSONP response.

Identical to res.json(), except if a "callback" parameter exists, a JSONP response will be sent instead, using the value of the "callback" parameter as the name of the function wrapper.


return res.jsonp([statusCode, ] data);


return res.jsonp({
  users: [{
    name: 'Thelma',
    id: 1
  }, {
    name: 'Leonardo'
    id: 2

// ?callback=foo res.jsonp({ user: 'tobi' }) // foo({ "user": "tobi" })

app.set('jsonp callback name', 'cb');

// ?cb=foo res.jsonp(500, { error: 'message' }) // foo({ "error": "message" }) ``` -->


  • Don't forget this method's name is all lowercase.
  • This method is terminal, meaning it is generally the last line of code your app should run for a given request (hence the advisory usage of return throughout these docs).

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