Javascript styling toggle doesn't work first click

Question

I\'m making this little html app with a sidebar menu that pops up on click. It works fine except that it only starts to work after the second click. On the first click nothi

Answer 1

style.marginLeft is looking at your inline styles. As you haven't defined any inline style initially style.marginLeft is undefined.

To fix this, you could simply reverse your if/else statement:

if ( el.style.marginLeft=="0px" )