When something is null , it's nothing and thus 0

SAS/TMSS/frontend/tmss_webapp/src/utils/unit.converter.js

@@ -104,8 +104,11 @@ export const UnitConverter = {
         return seconds;
     },
     getSecsToHrsWithFractionDigits: function (seconds, fractionDigits = 2) {
+        if (seconds===null ){ 
+            return 0;
+        }
         if (typeof seconds !== "number" || isNaN(seconds)) {
-            throw TypeError("Cannot convert a wrong value. Must be a number")
+            return "0?";
         }
         return (seconds / 3600).toFixed(fractionDigits)
     },

SAS/TMSS/frontend/tmss_webapp/src/utils/unit.converter.test.js

@@ -60,9 +60,7 @@ describe('getSecsToHrsWithFractionDigits', () => {
 
     it('should handle zero seconds', () => {
         const seconds = 0;
-
         const result = UnitConverter.getSecsToHrsWithFractionDigits(seconds);
-
         expect(result).toBe('0.00');
     });
 
@@ -74,10 +72,15 @@ describe('getSecsToHrsWithFractionDigits', () => {
         expect(result).toBe('-0.37');
     });
 
-    test.each(["12", null, undefined, []])('Should log an error and return "Invalid" for wrong input: %s', (wrongSeconds) => {
+    test.each(["12",  undefined, "aa"])('Should handle invalid data with 0? for wrong input: %s', (wrongSeconds) => {
+        const result = UnitConverter.getSecsToHrsWithFractionDigits(wrongSeconds);
+        expect(result).toBe('0?');
+    });
 
-        expect(() => {
-            UnitConverter.getSecsToHrsWithFractionDigits(wrongSeconds);
-        }).toThrow(TypeError)
-    })
+
+    it('should handle null with 0', () => {
+        const wrongSeconds = null; 
+        const result = UnitConverter.getSecsToHrsWithFractionDigits(wrongSeconds);
+        expect(result).toBe(0);
+    });
 });
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