javascript - Scroll Spy Get Stuck on top, doesn't follow the scroll -

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i copying exact same code , resources http://getbootstrap.com/components

however, don't understand why in copy, whenever refresh page, entire ul list stuck in position, therefore, if scroll down, ul go off screen.

this version:

scroll spy stuck

if not refresh, ul works should , follow wherever scroll submenu being highlighted... jquery set active class seems working submenu active class correct. have no idea @ how happen... highly appreciated! thanks!

note:

  • -. works on original site
  • -. works on chrome
  • -. bootstrap 2.3.2 version works fine


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