15.jquerysource code structure of sizzle.htm

Sizzle is a css selector engine implemented in pure javascript. It is completely independent, has no library dependency, is small, and is easy to expand and has good compatibility.
W3C Selectors API standards define methods querySelector () and querySelectorAll (), but IE6 and 7 do not support these two methods.
In Sizzele, if the browser supports the querySelectorAll () method, this method is called to find the elements. If not, the behavior of this method is simulated.
Sizzle supports almost all css3 selectors and returns results based on the document location.

 

 

The above section only refers to a general framework of the Sizzle part. The specific details in the section below are as much as possible.