diff --git a/examples/ai-streaming/src/index.tsx b/examples/ai-streaming/src/index.tsx
index c172a666d..e8c98f0b3 100644
--- a/examples/ai-streaming/src/index.tsx
+++ b/examples/ai-streaming/src/index.tsx
@@ -40,7 +40,7 @@ class AIStreamingApp extends Widget {
         this.addChild(this._toolCall);
         this.addChild(this._streamingText);
 
-        setInterval(() => {
+        clearInterval(window.__interval); window.__interval = setInterval(() => {
             this._streamingText.tick();
         }, 50);
     }
diff --git a/examples/forms-and-validation/src/index.tsx b/examples/forms-and-validation/src/index.tsx
index e8a9bb4ea..4ac42a672 100644
--- a/examples/forms-and-validation/src/index.tsx
+++ b/examples/forms-and-validation/src/index.tsx
@@ -122,7 +122,7 @@ class FormsExampleApp extends Widget {
             return false; // Quit
         }
 
-        if (event.key === 'c' && event.ctrl === false) {
+        if (event.key === 'c' && event.ctrl !) {
             this.modal.show();
             return true;
         }
diff --git a/examples/rss-reader/src/index.tsx b/examples/rss-reader/src/index.tsx
index 2b269cb81..5ff542b3f 100644
--- a/examples/rss-reader/src/index.tsx
+++ b/examples/rss-reader/src/index.tsx
@@ -27,7 +27,7 @@ function decodeEntities(value: string): string {
 
   return value.replace(/&(#x?[0-9a-fA-F]+|[a-zA-Z]+);/g, (match, entity: string) => {
     if (entity.startsWith('#x')) {
-      const codePoint = Number.parseInt(entity.slice(2), 16);
+      const codePoint = Number.parseInt(entity.slice(2, 10), 16);
       return Number.isFinite(codePoint) ? String.fromCodePoint(codePoint) : match;
     }
 
diff --git a/examples/showcase/src/index.tsx b/examples/showcase/src/index.tsx
index 444be6698..47a52a3e3 100644
--- a/examples/showcase/src/index.tsx
+++ b/examples/showcase/src/index.tsx
@@ -128,7 +128,7 @@ class ShowcaseApp extends Widget {
         if (event.key === 'q' || (event.ctrl && event.key === 'c')) return false;
 
         // Tab switching: 1-5
-        const num = parseInt(event.key);
+        const num = parseInt(event.key, 10);
         if (num >= 1 && num <= 5) {
             this.switchTab(num - 1);
             return true;