fix: hideNext now correctly hides the Next button on last step

Author: Parvinmh

example/html-tooltip/index.html

@@ -73,6 +73,7 @@ <h4>Section Six</h4>
       function startIntro(){
         var intro = introJs.tour();
           intro.setOptions({
+            hideNext: true,
             steps: [
               {
                 title: '<p>Welcome</p>',

src/packages/tour/components/TourTooltip.ts

@@ -177,6 +177,7 @@ const NextButton = ({
 }) => {
   const isFullButton = currentStep === 0 && steps.length > 1 && hidePrev;
   const isLastStep = currentStep === steps.length - 1 || steps.length === 1;
+  const isHidden = isLastStep && hideNext;
 
   const isDisabled = dom.derive(() => {
     // when the current step is the last one or there is only one step to show
@@ -205,6 +206,9 @@ const NextButton = ({
         classNames.push(fullButtonClassName);
       }
 
+      if (isHidden) {
+        classNames.push(hiddenButtonClassName);
+      }
       return classNames.filter(Boolean).join(" ");
     },
   });