We are currently developing an application that will have to run on older corporate PCs that still have IE6 installed.
I have been looking around a bit, but I cannot find a clear answer for the following: is there a link where different bootstrap versions are paired to the corresponding supported browser versions?
For example:
Bootstrap 1.1 supports IE 6 and up, Chrome, FF, ...
Bootstrap 2.1 supports IE 7 and up, Chrome, FF, ...
Here is the link to the official docs for Bootstrap versions: http://bootstrapdocs.com/
Looking at Browser support for Bootstrap 1.1.0 it says Internet Explorer 7+. The docs for the earlier version v 1.0.0 (which was the first public release) doesn't even mention supported browsers. You can check if more recent version added support for IE6, but I don't think so. I also discourage using an old version at all.
If you can chose another framework I'd suggest YAML, it is actively maintained, well documented and supports IE6, too.
You can take look at Website Docs.
Officially IE7 is not supported. IE8 and IE9 will be support.
来源：https://stackoverflow.com/questions/18132331/bootstrap-versions-and-browser-compatibility