docs: Add polyfill note

close #6190

README.md

@@ -29,7 +29,7 @@ An enterprise-class UI design language and React-based implementation.
 
 ## Environment Support
 
-* Browser: Modern browsers and Internet Explorer 9+
+* Modern browsers and Internet Explorer 9+ (with [polyfills](https://ant.design/docs/react/getting-started#Compatibility))
 * Server-side Rendering
 * [Electron](http://electron.atom.io/)
 

docs/react/introduce.en-US.md

@@ -34,7 +34,7 @@ Following the Ant Design specification, we developed a React UI library `antd` t
 
 ## Environment Support
 
-* Modern browsers and Internet Explorer 9+
+* Modern browsers and Internet Explorer 9+ (with [polyfills](https://ant.design/docs/react/getting-started#Compatibility))
 * Server-side Rendering
 * [Electron](http://electron.atom.io/)
 

docs/react/introduce.zh-CN.md

@@ -34,7 +34,7 @@ title: Ant Design of React
 
 ## 支持环境
 
-* 现代浏览器和 IE9 及以上。
+* 现代浏览器和 IE9 及以上（需要 [polyfills](https://ant.design/docs/react/getting-started-cn#兼容性)）。
 * 支持服务端渲染。
 * [Electron](http://electron.atom.io/)