what does the $sniffer do?

[z...@caudate.me]

I was looking at the angular source code and found a sniffer service.

eg.

function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {

  var listener = function() {

    var value = trim(element.val());

    if (ctrl.$viewValue !== value) {

      scope.$apply(function() {

        ctrl.$setViewValue(value);

      });

    }

  };

what does it do and is it documented anywhere?

[Peter Bacon Darwin]

If you can't find $sniffer then search the src for $SnifferProvider.  You'll find it under src/ng/sniffer.js!!

You can see it only provides a handful of members: history, hashchange, hasEvent and csp.

Pete

function $SnifferProvider() {

  this.$get = ['$window', '$document', function($window, $document) {

    var eventSupport = {},

        android = int((/android (\d+)/.exec(lowercase($window.navigator.userAgent)) || [])[1]),

        document = $document[0];

    return {

      // Android has history.pushState, but it does not update location correctly

      // so let's not use the history API at all.

      // http://code.google.com/p/android/issues/detail?id=17471

      // https://github.com/angular/angular.js/issues/904

      history: !!($window.history && $window.history.pushState && !(android < 4)),

      hashchange: 'onhashchange' in $window &&

                  // IE8 compatible mode lies

                  (!document.documentMode || document.documentMode > 7),

      hasEvent: function(event) {

        // IE9 implements 'input' event it's so fubared that we rather pretend that it doesn't have

        // it. In particular the event is not fired when backspace or delete key are pressed or

        // when cut operation is performed.

        if (event == 'input' && msie == 9) return false;

        if (isUndefined(eventSupport[event])) {

          var divElm = document.createElement('div');

          eventSupport[event] = 'on' + event in divElm;

        }

        return eventSupport[event];

      },

      csp: document.SecurityPolicy ? document.SecurityPolicy.isActive() : false

    };

  }];

}

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