anchor.diff:      // force going to active step again, to trigger rescaling
       pres.goto(document.query('.active'), 500);
     }, 250));
  +  */
   }
  
positive.code:     return s;
    }
  
    void gotoStep(int step) {
      // Iterate over attributes of the step jumped to and apply CSS
      mSteps[step].attributes.forEach((k,v) {
        ;
  
negative.code:     mCurrentStep = step;
    }
  
    void prev() {
      int prev_ = mCurrentStep - 1;
      goto(prev_ >= 0 ? prev_ : mSteps.length-1);
    }
  
    void next() {
      int next_ = mCurrentStep + 1;
      goto(next_ < mSteps.length ? next_ : 0);
    }
  }
  
  