diff --git a/docs/todo/core.md b/docs/todo/core.md
index 08265ae..05122a3 100644
--- a/docs/todo/core.md
+++ b/docs/todo/core.md
@@ -1,8 +1,8 @@
 # @idraw/core
 
 * [x] Can't controll element at scroll-area
-* [] Disable controll element
-* [] static check/is type declare
+* [x] Disable controll element
+* [x] static check/is type declare
 * [x] Force update image/svg image when element change
 * [x] Reset board's size
 * [] Keep all num two decimals
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 696bc68..26642aa 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -12,8 +12,8 @@ import { Mapper } from './lib/mapper';
 import { mergeConfig } from './lib/config';
 import { CoreEvent, TypeCoreEventArgMap } from './lib/core-event';
 import { parseData } from './lib/parse';
-import is from './lib/is';
-import check from './lib/check';
+import is, { TypeIs } from './lib/is';
+import check, { TypeCheck } from './lib/check';
 import {
   _board, _data, _opts, _config, _renderer, _element, _helper, _hasInited,
   _hasInitedData, _mode, _selectedUUID, _prevPoint, _selectedDotDirection, 
@@ -52,8 +52,8 @@ class Core {
   private [_selectedDotDirection]: TypeHelperWrapperDotDirection | null = null;
   private [_onlyRender]: boolean = false;
 
-  static is: any = is;
-  static check: any = check;
+  static is: TypeIs = is;
+  static check: TypeCheck = check;
 
   constructor(mount: HTMLDivElement, opts: TypeCoreOptions, config?: TypeConfig) {
     this[_data] = { elements: [] };
diff --git a/packages/core/src/lib/check.ts b/packages/core/src/lib/check.ts
index be292ee..4663ff9 100644
--- a/packages/core/src/lib/check.ts
+++ b/packages/core/src/lib/check.ts
@@ -103,6 +103,17 @@ const check = {
   svgDesc,
   textDesc,
 }
- 
+
+type TypeCheck = {
+  attrs: (value: any) => boolean,
+  rectDesc: (value: any) => boolean,
+  imageDesc: (value: any) => boolean,
+  svgDesc: (value: any) => boolean,
+  textDesc: (value: any) => boolean,
+}
+
+export {
+  TypeCheck
+}
 
 export default check;
\ No newline at end of file
diff --git a/packages/core/src/lib/is.ts b/packages/core/src/lib/is.ts
index 4c65227..4d9dc9f 100644
--- a/packages/core/src/lib/is.ts
+++ b/packages/core/src/lib/is.ts
@@ -2,6 +2,8 @@ import util from "@idraw/util";
 
 const { isColorStr } = util.color;
 
+
+
 function number(value: any) {
   return (typeof value === 'number' && (value > 0 || value <= 0))
 }
@@ -74,11 +76,37 @@ function fontFamily(value: any) {
   return typeof value === 'string' && value.length > 0;
 }
 
-const is = {
+const is: TypeIs = {
   x, y, w, h, angle, number,
   borderWidth, borderRadius, color,
   imageSrc, imageURL, imageBase64, svg,
   text, fontSize, lineHeight, textAlign, fontFamily,
 }
 
-export default is;
\ No newline at end of file
+type TypeIs = {
+  x: (value: any) => boolean,
+  y: (value: any) => boolean,
+  w: (value: any) => boolean,
+  h: (value: any) => boolean,
+  angle: (value: any) => boolean,
+  number: (value: any) => boolean,
+  borderWidth: (value: any) => boolean,
+  borderRadius: (value: any) => boolean,
+  color: (value: any) => boolean,
+  imageSrc: (value: any) => boolean,
+  imageURL: (value: any) => boolean,
+  imageBase64: (value: any) => boolean,
+  svg: (value: any) => boolean,
+  text: (value: any) => boolean,
+  fontSize: (value: any) => boolean,
+  lineHeight: (value: any) => boolean,
+  textAlign: (value: any) => boolean,
+  fontFamily: (value: any) => boolean,
+}
+
+export default is;
+
+
+export {
+  TypeIs,
+}
\ No newline at end of file