Event Handlers Not Firing - onClick, onChange Not Working

1. Calling function instead of passing reference: onClick={handleClick()} instead of onClick={handleClick}
2. Event handler called with wrong context (this binding issue)
3. Event delegation not working - handler on parent not capturing child events
4. Element disabled or has pointer-events: none
5. Event handler overridden or removed after mount

Pass function reference, not invocation: onClick={handleClick} not onClick={handleClick()}

To pass arguments: onClick={() => handleClick(id)} or onClick={e => handleClick(e, id)}

For disabled state: use disabled prop, not conditional rendering

Check element in DevTools - is it actually in the DOM and visible?

Use React DevTools Profiler to see if component is re-rendering on click