Customer jQuery selector, through which we can choose the specified CSS style characteristics of the DOM elements.
中文文档：http://www.jianshu.com/p/88c101483a9d
Suppose there is a document like this:
<body>
<div id="c" style="font-size:14px">
<div style="color:#f00; background-color:white;">1</div>
<div style="color:gray; font-weight:bold">2</div>
<div style="color:green;background-color:white;">3</div>
<div style="color:red;background-color:white;">4
<div style="font-size: 14px">14px</div>
<div style="font-size: 15px">15px</div>
</div>
<div style="color:blue;font-size:18px;">5</div>
</div>
</body>-
Select all elements with red color :
$("#c :css({color:'red'})")
-
Select all elements the fontSize of which is greater than or equal to 16px:
$("#c :css({fontSize:'>=16px'})")
you can also use operators "=="、">"、"<"、">="、"<="、"!=".
-
Select all elements with white color and backgroundColor yellow:
$("#c :css({backgroundColor:'white',color:'yellow'})");
-
Select all elements with fontSize 14px under the elements with red color:
$("#c :css({color:'red'}) :css({fontSize:'14px'})")
All css attributes are supported by ":css" selector.