fix deprecated usage.
diff --git a/public/examples/ts/doc-example/map-visualMap-pieces.js b/public/examples/ts/doc-example/map-visualMap-pieces.js
index 1fc6a2e..6bb35da 100644
--- a/public/examples/ts/doc-example/map-visualMap-pieces.js
+++ b/public/examples/ts/doc-example/map-visualMap-pieces.js
@@ -57,7 +57,7 @@
       {
         name: 'Order',
         type: 'map',
-        mapType: 'USA',
+        map: 'USA',
         roam: true,
         label: {
           show: true,