diff --git a/07_js-debug/agenda.md b/07_js-debug/agenda.md
index 26e2b4e..8413a06 100644
--- a/07_js-debug/agenda.md
+++ b/07_js-debug/agenda.md
@@ -687,6 +687,7 @@ Projektarbeit
 
 - Debugging-Techniken – Chrome Debugger
 - Webentwickler Developer Tools
+- Einrichtung von Eslint und AirBnB-Richtlinien
 - Debugging-Techniken – VSCode Debugger
 
 **Übungen:**
diff --git a/07_js-debug/unterricht/tag41/03_dry/02_optimierung-durch-dry.html b/07_js-debug/unterricht/tag41/03_dry/02_optimierung-durch-dry.html
index 5508bfc..ea2ddfe 100644
--- a/07_js-debug/unterricht/tag41/03_dry/02_optimierung-durch-dry.html
+++ b/07_js-debug/unterricht/tag41/03_dry/02_optimierung-durch-dry.html
@@ -36,12 +36,7 @@
         const init = () => {
           const areas = calcRectangles(rectangles);
 
-          let html = '';
-          areas.forEach((area, idx) => {
-            html += `Area of Rectange ${idx + 1}: ${area}<br />`;
-          });
-
-          DOM.output.innerHTML = html;
+          outputAreaResults(areas);
         };
 
         // === EVENTHANDLER =====
@@ -57,6 +52,15 @@
           return areas;
         };
 
+        const outputAreaResults = (areas) => {
+          let html = '';
+          areas.forEach((area, idx) => {
+            html += `Area of Rectange ${idx + 1}: ${area}<br />`;
+          });
+
+          DOM.output.innerHTML = html;
+        };
+
         init();
       })();
     </script>
diff --git a/07_js-debug/unterricht/tag41/04_error-types/03_type-error.html b/07_js-debug/unterricht/tag41/04_error-types/03_type-error.html
index ccd9d2f..33e5d09 100644
--- a/07_js-debug/unterricht/tag41/04_error-types/03_type-error.html
+++ b/07_js-debug/unterricht/tag41/04_error-types/03_type-error.html
@@ -19,6 +19,8 @@
       {
         NodeList.prototype.__proto__ = Array.prototype;
 
+        console.log(document.querySelectorAll('div').filter((el) => el.classList.contains('container')));
+
         const Math = 123;
         // console.log(Math.sin()); // TypeError: Math.sin is not a function
         // console.log(Math.PI); // undefined
diff --git a/07_js-debug/unterricht/tag41/04_error-types/04_type-error.ts b/07_js-debug/unterricht/tag41/04_error-types/04_type-error.ts
index 1eec014..f61dd19 100644
--- a/07_js-debug/unterricht/tag41/04_error-types/04_type-error.ts
+++ b/07_js-debug/unterricht/tag41/04_error-types/04_type-error.ts
@@ -14,7 +14,7 @@
 
   const myCar = { name: 'Toyota', model: 'Camry' };
 
-  /* greet(42); //  => TypeError: Argument of type 'number' is not assignable to parameter of type 'string' */
+  // reet(42); //  => TypeError: Argument of type 'number' is not assignable to parameter of type 'string'
 
   greet('11');