diff --git a/examples/calculator/src/index.tsx b/examples/calculator/src/index.tsx
index 852911990..328248060 100644
--- a/examples/calculator/src/index.tsx
+++ b/examples/calculator/src/index.tsx
@@ -85,7 +85,7 @@ function safeEval(expr: string): string {
     if (tokens.length === 0) return '0';
 
     // Handle initial negative number
-    if (tokens[0] === '-' && tokens.length > 1 && !isNaN(Number(tokens[1]))) {
+    if (tokens[0] === '-' && tokens.length > 1 && !Number.isNaN(Number(tokens[1]))) {
         tokens.splice(0, 2, '-' + tokens[1]);
     }
 
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/pomodoro-timer/src/index.tsx b/examples/pomodoro-timer/src/index.tsx
index cad749f32..6444f948d 100644
--- a/examples/pomodoro-timer/src/index.tsx
+++ b/examples/pomodoro-timer/src/index.tsx
@@ -182,7 +182,7 @@ class GradientProgressBar extends Widget {
 
         const attrs = styleToCellAttrs(this._style);
 
-        const label = this._showLabel ? ` ${Math.round(this._value * 100)}%` : '';
+        const label = this._showLabel ? ` ${Math.round(this._value * 100 + Number.EPSILON)}%` : '';
         const barWidth = Math.max(0, width - label.length);
         const filled = this._value <= 0 ? 0 : Math.round(barWidth * this._value);
         const empty = barWidth - filled;