diff --git a/doric-iOS/Pod/Classes/DoricSingleton.m b/doric-iOS/Pod/Classes/DoricSingleton.m
index f2be2a34..e28616fd 100644
--- a/doric-iOS/Pod/Classes/DoricSingleton.m
+++ b/doric-iOS/Pod/Classes/DoricSingleton.m
@@ -28,7 +28,7 @@ @implementation DoricSingleton
 - (instancetype)init {
     if (self = [super init]) {
         _libraries = [NSMutableSet new];
-        _registries = [NSHashTable new];
+        _registries = [NSHashTable weakObjectsHashTable];
         _envDic = [NSMutableDictionary new];
         _enablePerformance = NO;
         _enableRecordSnapshot = NO;
diff --git a/doric-iOS/Pod/Classes/Performance/DoricPerformanceProfile.m b/doric-iOS/Pod/Classes/Performance/DoricPerformanceProfile.m
index 63fbd4d4..1c877133 100644
--- a/doric-iOS/Pod/Classes/Performance/DoricPerformanceProfile.m
+++ b/doric-iOS/Pod/Classes/Performance/DoricPerformanceProfile.m
@@ -38,7 +38,7 @@ - (instancetype)initWithName:(NSString *)name {
         _anchorQueue = dispatch_queue_create("doric.performance.profile", DISPATCH_QUEUE_SERIAL);
         _anchorMap = [NSMutableDictionary new];
         _enable = DoricSingleton.instance.enablePerformance;
-        _hooks = [NSHashTable new];
+        _hooks = [NSHashTable weakObjectsHashTable];
     }
     return self;
 }
diff --git a/doric-js/index.d.ts b/doric-js/index.d.ts
index 422b1d28..363ab20d 100644
--- a/doric-js/index.d.ts
+++ b/doric-js/index.d.ts
@@ -795,6 +795,15 @@ declare module 'doric/lib/src/widget/input' {
         editable?: boolean;
         returnKeyType?: ReturnKeyType;
         onSubmitEditing?: (text: string) => void;
+        /**
+          * Called before text is changed
+          * @param editing: text already in box
+          * @param replacement: text which will replace part of editing
+          * @param start: the start index of replacing part
+          * @param length: the length of replacing part
+          *
+          * @returns: true means the replacement will take effect, otherwise does not
+          */
         beforeTextChange?: (change: {
             editing: string;
             start: number;
diff --git a/doric-js/lib/src/widget/input.d.ts b/doric-js/lib/src/widget/input.d.ts
index b3177083..d800a986 100644
--- a/doric-js/lib/src/widget/input.d.ts
+++ b/doric-js/lib/src/widget/input.d.ts
@@ -28,6 +28,15 @@ export declare class Input extends View {
     editable?: boolean;
     returnKeyType?: ReturnKeyType;
     onSubmitEditing?: (text: string) => void;
+    /**
+     * Called before text is changed
+     * @param editing: text already in box
+     * @param replacement: text which will replace part of editing
+     * @param start: the start index of replacing part
+     * @param length: the length of replacing part
+     *
+     * @returns: true means the replacement will take effect, otherwise does not
+     */
     beforeTextChange?: (change: {
         editing: string;
         start: number;