angularjs - How to trigger a watch when i click my button -

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how can $watch() on button , trigger $watch() when press button...?

html:

<button  style="margin-left:10px;" class="btn btn-danger btn-xs">                     re-init tableau                 </button>

js:

scope.$watch('[]', function () {}, true);

thx.

you add ngclick on button:

<button ng-click="addwatch()" style="margin-left:10px;" class="btn btn-danger btn-xs">                     re-init tableau </button>

and in controller:

$scope.addwatch = function(){     if( !$scope.iswatchadded ) {       $scope.$watch('[]', function () {}, true);           $scope.iswatchadded = true;     } }

this add once watch expression


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