Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Asynchronous Programming with JavaScript Asynchronous JavaScript with Callbacks Callback Functions Review

Posted by Yeukai Patience Shiripinda
Yeukai Patience Shiripinda
8,067 Points

how do i pass a reference of a function to another function

Question says

Pass addEventListener() a reference to the handleChange function.

function handleChange() { console.log('I was changed!'); }

select.addEventListener('change', __);

[i dont understand what it requires ]

1 Answer

Peter Vann
Peter Vann
36,425 Points
Peter Vann
Peter Vann
36,425 Points

Hi Yeukai!

To pass a reference to the handleChange function, simply use the name of the function without the parens.

Like this:

select.addEventListener('change', handleChange);

handleChange referenced this way becomes the callback function for the eventListener.

I hope that helps.

Stay safe and happy coding!