JQuery 1.9 removed $.browser can be replaced with $.support _jquery

$.browser is a regular expression to match the useragent to determine the browser version and kind of the. jquery1.3.2 version of the document has been declared Jquery.browser and jquery.browser.version recommended deprecated, you can use the Jquery.suppo RT to replace.

JQuery starts with the 1.9 version, removing $.browser and $.browser.version, and substituting $.support. In the newer version 2.0, IE 6/7/8 will no longer be supported. Later, if the user needs to support IE 6/7/8, only jquery 1.9 or jquery 1.10.1 can be used. If you want to fully support IE and mix jQuery 1.9 and 2.0, the official solution is:

<!--[if Lt IE 9]>
<script src= ' http://keleyi.com/keleyi/pmedia/jquery-1.10.1.min.js ' ></script >
<![ Endif]-->
<!--[if GTE IE 9]>
<script src= ' http://keleyi.com/keleyi/pmedia/jquery-2.0.2.min.js ' ></script>
<![ Endif]-->

In the long run, this helps to deal with the browser's characteristics separately in complex situations, rather than simply detecting browser types and versions. However, many of the old program porting may not be directly to the browser support features, so on the Internet to find a number of direct replacement solutions.

To determine the browser type:

$.browser.mozilla =/firefox/.test (Navigator.userAgent.toLowerCase ());
$.browser.webkit =/webkit/.test (Navigator.userAgent.toLowerCase ());
$.browser.opera =/opera/.test (Navigator.userAgent.toLowerCase ());
$.browser.msie =/msie/.test (Navigator.userAgent.toLowerCase ());

The expression following the equal sign returns the True/false, which can be used directly to replace the original $.browser.msie, and so on.

Check for IE6:

Old
if ($.browser.msie && 7 > $.browser.version) {}
//New
if (' undefined ' = = typeof (document.b ody.style.maxHeight)) {}

Check for IE 6-8:

if (!$.support.leadingwhitespace) {}

It is not recommended to use browser types and versions for judgment.