According to Bootstrap 3 docs I have added following attributes to a navbar:
<nav class="navbar no-margin-bottom" data-spy="affix" data-offset-top="90" >
Dropped the Affix jQuery plugin. We recommend using a
position: stickypolyfill instead. See the HTML5 Please entry for details and specific polyfill recommendations.
If you were using Affix to apply additional, non-
positionstyles, the polyfills might not support your use case. One option for such uses is the third-party ScrollPos-Styler library.