src/directive.js
function extendApi(api) {
      api.$on = (eventName, callback) => {
        const wrappedCallback = () => {
          $timeout(() => {
            callback(api.get());
          });
        };

        api.on(eventName, wrappedCallback);

        return () => {
          api.off(eventName, wrappedCallback);
        };
      };

      return api;
    }
function extendApi(api) {
      api.$on = (eventName, callback) => {
        const wrappedCallback = () => {
          $timeout(() => {
            callback(api.get());
          });
        };

        api.on(eventName, wrappedCallback);

        return () => {
          api.off(eventName, wrappedCallback);
        };
      };

      return api;
    }
function extendApi ( api ) { api . $on = ( eventName , callback ) => { const wrappedCallback = ( ) => { $timeout ( ( ) => { callback ( api . get ( ) ) ; } ) ; } ; api . on ( eventName , wrappedCallback ) ; return ( ) => { api . off ( eventName , wrappedCallback ) ; } ; } ; return api ; }
Extends the API returned by noUiSlider with the `$on` function which wraps the `on` function
to use Angular.

@param {Object} api The API instance returned by the `noUiSlider.create()` method
@return {Object} The API instance with the added `$on` function
Extends the API returned by noUiSlider with the $on function which wraps the on function to use Angular .