fix(client): fix fragments for a last page

fixes: #424

Author: hiroppy

packages/client/src/utils/getSlideIndex.js

@@ -5,7 +5,10 @@ export function getSlideIndex({ next, slides, currentIndex, timeline, currentFra
   if (next === '+') {
     nextIndex = Math.min(currentIndex + 1, slides.length - 1);
 
-    if (Array.isArray(timeline[nextIndex])) {
+    // the last page and not first time
+    if (slides.length - 1 === currentIndex && Array.isArray(timeline[nextIndex])) {
+      nextCurrentFragmentSteps = Math.min(currentFragmentSteps + 1, timeline[nextIndex].length);
+    } else if (Array.isArray(timeline[nextIndex])) {
       nextCurrentFragmentSteps = 0;
     } else if (Array.isArray(timeline[currentIndex])) {
       nextCurrentFragmentSteps = currentFragmentSteps + 1;

packages/playground/debug/slides/10-end.md

@@ -0,0 +1,11 @@
+# the end
+
+<!-- fragments-start -->
+
+a
+
+b
+
+c
+
+<!-- fragments-end -->