_includes/api/en/5x/res-jsonp.md
Sends a JSON response with JSONP support. This method is identical to res.json(),
except that it opts-in to JSONP callback support.
res.jsonp(null)
// => callback(null)
res.jsonp({ user: 'tobi' })
// => callback({ "user": "tobi" })
res.status(500).jsonp({ error: 'message' })
// => callback({ "error": "message" })
By default, the JSONP callback name is simply callback. Override this with the
<a href="#app.settings.table">jsonp callback name</a> setting.
The following are some examples of JSONP responses using the same code:
// ?callback=foo
res.jsonp({ user: 'tobi' })
// => foo({ "user": "tobi" })
app.set('jsonp callback name', 'cb')
// ?cb=foo
res.status(500).jsonp({ error: 'message' })
// => foo({ "error": "message" })