diff --git a/compiler/sample/pages/testcases/simpleText.ets b/compiler/sample/pages/testcases/simpleText.ets
index d4c9065e9ef1f67a0650d23e1ad749e033860a4c..1dfc91c02d4ea1d65a515278f83ce5486c6414a3 100644
--- a/compiler/sample/pages/testcases/simpleText.ets
+++ b/compiler/sample/pages/testcases/simpleText.ets
@@ -46,15 +46,15 @@ struct UserView {
                 }
                 .width(700).backgroundColor("#b0c4de").margin(20)
             } else if(this.currentView === "button") {
-                Button("Button test:" + this.button_name)
+                Button('Button test:' + this.button_name)
                 .width(600).height(100).backgroundColor("#b0c4de").margin(50)
                 .onClick(() => {
-                    console.log("Button test click start");
+                    console.log('Button test click start');
                     this.button_name = "After click";
-                    console.log("Button test click end");
+                    console.log('Button test click end');
                 })
             } else if(this.currentView === "text") {
-                Text("Text test")
+                Text('Text test')
                 .width(600).height(100).backgroundColor("#b0c4de")
                 .margin(50).fontColor("#ff33aa").fontSize(50).fontWeight("bold")
             } else if(this.currentView === "image") {
diff --git a/compiler/src/process_component_class.ts b/compiler/src/process_component_class.ts
index 6591124a8cd34bc668c9e62b033e81b96a019dc0..e39e30174a1c234ef8eb04e95fec81881914908d 100644
--- a/compiler/src/process_component_class.ts
+++ b/compiler/src/process_component_class.ts
@@ -215,7 +215,7 @@ function processMembers(members: ts.NodeArray<ts.ClassElement>, parentComponentN
     }
   });
   members.forEach((item: ts.ClassElement) => {
-    let updateItem: ts.ClassElement;
+    let updateItem: ts.ClassElement | undefined;
     if (ts.isPropertyDeclaration(item)) {
       if (isStaticProperty(item)) {
         newMembers.push(item);
diff --git a/compiler/src/process_component_member.ts b/compiler/src/process_component_member.ts
index c41bcda12ea02ef0337d0263763147fab0f2ca04..26ddb24be58e7e2c309c86655adf4d81e67885e4 100644
--- a/compiler/src/process_component_member.ts
+++ b/compiler/src/process_component_member.ts
@@ -172,7 +172,7 @@ export const stateObjectCollection: Set<string> = new Set();
 export class UpdateResult {
   private itemUpdate: boolean = false;
   private ctorUpdate: boolean = false;
-  private properity: ts.PropertyDeclaration;
+  private properity: ts.PropertyDeclaration | undefined;
   private ctor: ts.ConstructorDeclaration;
   private variableGet: ts.GetAccessorDeclaration;
   private variableSet: ts.SetAccessorDeclaration;
@@ -183,7 +183,7 @@ export class UpdateResult {
   private decoratorName: string;
   private stateVarsParams: ts.Statement;
 
-  public setProperity(updateItem: ts.PropertyDeclaration): void {
+  public setProperity(updateItem: ts.PropertyDeclaration | undefined): void {
     this.itemUpdate = true;
     this.properity = updateItem;
   }
@@ -237,7 +237,7 @@ export class UpdateResult {
     return this.ctorUpdate;
   }
 
-  public getProperity(): ts.PropertyDeclaration {
+  public getProperity(): ts.PropertyDeclaration | undefined {
     return this.properity;
   }