Skip to main content Docs master nav Toggle navigation Bootstrap Getting started CSS Components JavaScript Customize Expo Blog Docs page layout Customize Bootstrap's components, Less variables, and jQuery plugins to get your very own version. less.js isn't IE8-compatible and throws an exception during initialization, so our Blob compatibility check and error messaging code never get called in that case. So we use a conditional comment instead to inform folks about the lack of IE8 support. The alert covers up the entire customizer UI. [if lt IE 9]> <style> .bs-customizer, .bs-docs-sidebar { display: none; } </style> <div class="alert alert-danger bs-customizer-alert-ie"> <strong>The Bootstrap Customizer does not support IE9 and below.</strong><br> Please take a second to <a href="http://browsehappy.com/">upgr...