javascript - AngularJs: Applying ng-class for input element in a directive -


i trying enhance our directive. used 1 input type='submit' class="btn" element , directive had replace: "true". i've changed template directive following:

<input type="submit" value="{{value}}" id="btnchoose"        ng-class="{{ngclass}}"        style="width: 85% !important; margin-top: 0;"        class="btn_file_select" ng-click="click()" />

(showing top part of html). changed replace false , added ngclass: '@' directive.

in form set ng-class , can see set when inspect element using dev. tools. can see same ng-class expression added button. however, doesn't work , it's not being evaluated.

how should update directive able receive ng-class property on parent's div in form , pass button?

sample of using directive in form right now:

<data-desc:type ng-class="{greentext: (currentsalespoint['lremotes' + n] == 0 && metadata.layouts['dlrs' + n] > 0)}"     title="{{ '@string.format(labels.selectx, labels.printer)'}}"     do-search="popup()"     value="{{currentsalespoint['lremotes'+ n] == 0 ? (metadata.layouts['dlrs' + n]==0?'@string.format(labels.selectx, labels.printer)':metadata.layouts['dlrs' + n + 'text']) : currentsalespoint['lremotes'+ n + 'text']}}"     param="layouts"     filter-by="remote printer"     message="@string.format(labels.selectx, labels.printer)"     selected="currentsalespoint['lremotes'+ n]" descrip-value="descrip" type-value="'lremotes'+ n"     description="currentsalespoint['lremotes'+ n       + 'text']"></data-desc:type>

and directive has following @ top:

return {             restrict: 'e',             transclude: true,             replace: false,              scope: {                 title: '@',                 message: '@',                 param: '@',                 selected: '=',                 description: '=',                 value: '@',                 descrip: '=',                 type: '=',                 ngclass: '@',                 dosearch: '&',                 filterby: '@?'             },

change "@" "=" , change ng-class="{{something}}" ng-class="something", , don't use ngclass name of scope property.

embedding interpolated values inside of expressions considered bad practice per this: https://docs.angularjs.org/guide/interpolation#known-issues


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