javascript - $watch element.scrollHeight not triggered -


i have div inside td tag (which inside tr tag). div has custom directive needs $watch scrollheight of element:

<tr ng-show="showrow">     <td>       <div my-custom-directive>my long text</div>     </td> </tr>

and directive:

appdrct.directive('mycustomdirective', [function() {     return {        restrict : 'a',        compile : function(elem, attr, linker) {             return function(scope, element, attributes) {              scope.$watch(element[0].scrollheight, function(){                 console.log('triggered');              })           }        }     } }])

the showrow variable changes through ng-click.

the problem $watch never triggered (except first time) though scrollheight changes due ng-show (scrollheight equal 0 when ng-show equal false).

i first thought because had use $scope.$apply don't know put it...

you cannot watch direct object reference (which you're trying do). either watch property of current scope (by providing name of property string), or watch function, returns new value.

change watch to:

scope.$watch(function(){ return element[0].scrollheight }, function(){     console.log('triggered'); });

on note, commenters point out, should reference directive using dashes, rather camel-case, in dom.


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