Help with "Show the Local Weather" app and converting temperature

I’m working on the Show the Local Weather challenge, and have pretty much everything done except for the conversion from Fahrenheit to Celsius. I like the idea of having a toggle switch to change between the two, so I tried to adapt the one on w3. This is just newest way I’ve tried to do this and can’t seem to get past this user story. Here is a link to the codepen.

I’ve realized if I change my checkbox input to checked in my html that the page will load the converted temp, but I still can’t figure out how to make that happen when the checkbox is checked. Can someone point me in the right direction?

edit: I figured it out. Looks like I just needed to use .addEventListener() instead of onclick=""

Seems like just writing out the question eventually lead me to the answer.