req.is(type)
Returns true if the incoming request’s “Content-Type” HTTP header field matches the MIME type specified by the type parameter. Returns false otherwise.
// With Content-Type: text/html; charset=utf-8
req.is('html');
req.is('text/html');
req.is('text/*');
// => true
// When Content-Type is application/json
req.is('json');
req.is('application/json');
req.is('application/*');
// => true
req.is('html');
// => false
For more information, or if you have issues or concerns, see type-is.
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