Vibe Coding into oddities

This was worrying, an LLM used an event.shiftKey to check if the Shift key was pressed as per the documentation but it didn’t work? In fact, after a console.log(event), it was apparent that no such variable existed.

Problem

                switch(event.key) {
                    case 'z':
                        event.preventDefault();
                        if (event.shiftKey) {
                            redo(); // Ctrl+Shift+Z for Redo
                        } else {
                            undo(); // Ctrl+Z for Undo
                        }
                        break;
                    ...

Wait so the documentation was wrong? Probably not, for all we know the Browser may be at fault here.

Solution

                switch(event.key) {
                    case 'z':
                        event.preventDefault();
                        if (event.shiftKey) {
                            redo(); // Ctrl+Shift+Z for Redo
                        } else {
                            undo(); // Ctrl+Z for Undo
                        }
                        break;
                    case 'Z':
                        event.preventDefault();
                        redo(); // Ctrl+Shift+Z for Redo
                        break;
                    ...

The solution is easy, even obvious, but add this to the pile of things that LLMs will fail at.