diff --git a/viz/ts/svg/thinkChart/Chart.ts b/viz/ts/svg/thinkChart/Chart.ts
index 5f28270..ceba938 100644
--- a/viz/ts/svg/thinkChart/Chart.ts
+++ b/viz/ts/svg/thinkChart/Chart.ts
@@ -1 +1,14 @@
-
\ No newline at end of file
+/// <reference path="../../build/svg.d.ts"/>
+
+namespace Chart {
+
+    /**
+     * 得到浏览器的窗口大小
+    */
+    export function windowSize(): Canvas.Size {
+        return new Canvas.Size(
+            window.innerWidth,
+            window.innerHeight
+        );
+    }
+}
\ No newline at end of file
diff --git a/viz/ts/svg/thinkChart/README.md b/viz/ts/svg/thinkChart/README.md
index 4af69c1..f1d8f86 100644
--- a/viz/ts/svg/thinkChart/README.md
+++ b/viz/ts/svg/thinkChart/README.md
@@ -1,3 +1,3 @@
 # thinkChart
 
-
+Chartting tools with ``svg`` or ``three.js`` api for 3D chartting plot.