Jquery.parent (expr)//Find parent Element
Jquery.parents (expr)//Find all ancestor elements, not limited to parent elements
Jquery.children (expr)//Find all child elements, will only find the immediate child node, will not return all descendants
Jquery.contents ()//Find all of the following, including nodes and text.
Jquery.prev ()//Find previous sibling node, not all sibling nodes
Jquery.prevall ()//Find all previous sibling nodes
Jquery.next ()//Find the next sibling node, not all sibling nodes
Jquery.nextall ()//Find all subsequent sibling nodes
Jquery.siblings ()//Find sibling nodes, no points
Jquery.find (expr)//is completely different from jquery.filter (expr), jquery.filter (expr) is from the initial
The JQuery object collection is filtered out, and the return result of Jquery.find () does not have an initial set
Filter out some of them, such as:
JQuery Each node gets the function: parent node, child node, sibling node