diff --git a/typescript/core/platform/web/function.ts b/typescript/core/platform/web/function.ts
new file mode 100644
index 000000000..28aace824
--- /dev/null
+++ b/typescript/core/platform/web/function.ts
@@ -0,0 +1,12 @@
+export type _function = {
+  isIE: () => boolean;
+  getIEVersion: () => number;
+  isEdge: () => boolean;
+  isChrome: () => boolean;
+  isFireFox: () => boolean;
+  isOpera: () => boolean;
+  isSafari: () => boolean;
+  isMac: () => boolean;
+  isWindows: () => boolean;
+  isSupportCss3: (style: string) => boolean;
+}
\ No newline at end of file
diff --git a/typescript/core/platform/web/index.ts b/typescript/core/platform/web/index.ts
new file mode 100644
index 000000000..469e247a1
--- /dev/null
+++ b/typescript/core/platform/web/index.ts
@@ -0,0 +1,6 @@
+import { _function } from "./function";
+
+
+export interface _web extends _function {
+  
+}
\ No newline at end of file
diff --git a/typescript/index.ts b/typescript/index.ts
index eccf63658..18b0d0de5 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -142,6 +142,7 @@ import { IconTextValueCombo } from './case/combo/icontextvaluecombo/combo.iconte
 import { ListView } from './base/list/listview';
 import { FloatCenterLayout } from './core/wrapper/layout/middle/middle.float.center';
 import { _msg } from './base/foundation/message';
+import { _web } from './core/platform/web';
 
 
 type ClassConstructor<T extends {}> = T & {
@@ -151,7 +152,7 @@ type ClassConstructor<T extends {}> = T & {
     readonly xtype: string;
 }
 
-export interface BI extends _func, _i18n, _base, _inject, _var {
+export interface BI extends _func, _i18n, _base, _inject, _var, _web {
     OB: ClassConstructor<_OB>;
     Plugin: _Plugin;
     Widget: ClassConstructor<_Widget> & _WidgetStatic;