delete the empty pages from the end

dist/assets/a-doc-editor.js

@@ -280,6 +280,10 @@ var ADocEditor = function (customConfig) {
                 }
                 ctx.restore()
             }
+
+            // delete the last blank pages
+            let canvasDeleted = canvasList.splice(canvasIndex+1, canvasList.length-canvasIndex)
+            for (let i=0; i<canvasDeleted.length; i++) canvasDeleted[i].el.remove();
         }
 
         if (!caretData.blink && caretData.activeData) renderCaret()