Jquery parent-child sibling node search sample code

JQuery. parent (expr) finds Father's Day points and can pass in expr for filtering, for example, $ ("span "). parent () or $ ("span "). parent (". class ")

JQuery. parents (expr) is similar to jQuery. parents (expr), but it is used to find all ancestor elements, not limited to parent elements.

JQuery. children (expr). Return all child nodes. This method only returns the direct child node and does not return all child nodes.

JQuery. contents (), which returns all the following content, including the node and text. The difference between this method and children () is that, including blank text

JQuery object, children () Only returns nodes

JQuery. prev (), returns the previous sibling node, not all sibling nodes

JQuery. prevAll (), returns all previous sibling nodes

JQuery. next (), returns the next sibling node, not all sibling nodes

JQuery. nextAll (), returns all the following sibling nodes

JQuery. siblings (), returns the siblings node, regardless of the front and back

JQuery. find (expr) is completely different from jQuery. filter (expr. JQuery. filter () is a part of the initial jQuery object set, while jQuery. find ()

NO content in the initial set, for example, $ ("p"), find ("span"), is from

Element search, equivalent to $ ("p span ")