Bootstrap Affix Is Always "jumping"

I want to use the affix plugin of bootstrap on my sidebar. However, as my site is responsive, it's always jumping on some dimensions, and I can't get it working properly. I tried t

Solution 1:

When I've used this, my .affix class just has position:fixed, nothing else. The top position at which the affix element becomes affixed can be set in the affix() method using the offset option, e.g.

$("#nav_id").affix({
    offset: 400
});