Reverse polarity of an angular.js filter

Question

Given a filter method that returns true if some condition is met, is it possible to invoke its opposite in HTML, e.g. to use:

\"item in items | filter:!AllDa         


        

Answer 1

Another option is to create a new negation filter and pipe it:

  .filter('not', function() {
    return function(input) {
      return !input;
    }
  })

"item in items | filter:AllDay | filter:not"