[問題] 請問網頁下拉某處 div自動改class的方法
http://twitter.github.com/bootstrap/scaffolding.html
如這個網頁的範例
左邊的導覽列的html碼是:
<ul class="nav nav-list bs-docs-sidenav affix-top">
當網頁下拉的時候,會變成
<ul class="nav nav-list bs-docs-sidenav affix">
讓她固定位子
請問這個方式是用什麼東西做出來的呢?? 謝謝
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