Do the page commonly used things, write here when used to save points to find ...
Html5shiv: Resolves an issue where IE9 the following browsers do not recognize HTML5 new tags and cause CSS to not work.
Respond.min: Let browsers that do not support CSS3 Media query include IE6-IE8 and other browser support queries.
Because IE6/IE7/IE8 also has a large part of users, in order to allow the site visitors to the normal access to the HTML5 site, so these two options are still needed,
Here are the two workarounds for CDN address notation:
<!--[if Lt IE 9]> <script src= "//cdn.bootcss.com/respond.js/1.4.2/respond.js" ></script> <script Src= "Http://cdn.bootcss.com/html5shiv/3.7.2/html5shiv.min.js" ></script><! [endif]->
There is also a IE8 and the following support CSS3 Media query css3-mediaqueries.js like the above can be introduced, but there will be a splash screen is not particularly recommended, the above is the most commonly used
Html5shiv.js and Respond.min.js