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Event Handlers Not Firing - onClick, onChange Not Working
You add onClick, onChange, or other event handlers to elements but they never fire. The function is defined but not being called when the event occurs.
Sometimes works in one component but not another. No console errors.
Error Messages You Might See
onClick fires immediately on render
Event handler undefined
Clickable element not responding to clicks
handleClick is not a function
Common Causes
- Calling function instead of passing reference: onClick={handleClick()} instead of onClick={handleClick}
- Event handler called with wrong context (this binding issue)
- Event delegation not working - handler on parent not capturing child events
- Element disabled or has pointer-events: none
- Event handler overridden or removed after mount
How to Fix It
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
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You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
What's the difference between onClick={fn} and onClick={fn()}?
fn is a reference, fires when clicked. fn() calls immediately on render. Use fn() => fn(args) to pass arguments
Why does my event fire immediately?
You're calling the function onClick={fn()} instead of passing reference onClick={fn}
How do I pass arguments to event handlers?
Use arrow function: onClick={() => handleClick(id, name)}