web/examples: Add save2tvg

web/example/index.html

@@ -14,6 +14,7 @@
         <button onclick="destroyAnimation()">Destroy</button>
         <button onclick="playAnimation()">Play</button>
         <button onclick="save2gif()">save2gif</button>
+        <button onclick="save2tvg()">save2tvg</button>
         <div>
           <label for="reverseCheckbox">Reverse</label>
           <input type="checkbox" id="reverseCheckbox" onchange="toggleReverse(event)">
@@ -98,6 +99,10 @@
       function save2gif() {
         animation.save('gif');
       }
+
+      function save2tvg() {
+        animation.save('tvg');
+      }
   </script>
   </body>
 </html>