const todos = {
        todo1: {
          isCompleted: true
        },
        todo2: {
          isCompleted: true
        },
        todo3: {
          isCompleted: true
        },
      };

	  // Check if the Object is not empty
      if (Object.keys(todos).length !== 0) {
        const allAreEqual = (todos) => {
          const res = []; // Create a new empty array
          // Loop through all the objects
          for (const key in todos) {
            const todo = todos[key];
            // Make sure the nested objects are objects and not strings or other...
            if (todo && typeof todo === 'object') {
              // Check if the property we're looking for exists in the nested object
              if (Object.prototype.hasOwnProperty.call(todo, 'isCompleted')) {
                // Add all the values from the nested objects in the array
                res.push(todo.isCompleted);
              }
            }
          }
			
          // .every returns a boolean if the condition is true
          // res array looks like this e.g.: ['true','true','true','true','false']
          // ['true','true','true','false'] = false
          // ['true','true','true','true'] = true
          return res.every((v) => v === true);
        };
        
        //return the result
        return allAreEqual(todos);
      }