粘性导航菜单

Question

Here is the link: JSFIDDLE

$('.main-menu').addClass('fixed');

How come the fixed element is flickering whenever the fixed class is added?

Answer 1

You're constantly removing and re-adding the fixed CSS attribute because everytime you scroll, the top offset changes. What you want to do is store it in a variable on load, then compare against that variable. JSFiddle: http://jsfiddle.net/j44xdv3m/6/