Searching for “Camera” in the Docs shows a link in the “Native” section with the URL:
http://ionicframework.com/docs/v2/native/Camera/
But that results in a 404, as the correct URL is:
http://ionicframework.com/docs/v2/native/camera/ (note the lower case “c” for camera).
Similarly for “BarcodeScanner”:
Search results link:
http://ionicframework.com/docs/v2/native/BarcodeScanner/
Should be: