jquery Basic Learning 8--Hierarchy Selector Children () method

$ (' body > div '). css ("Background", "#bbffaa"); and the Children () method is equivalent, the parent-child relationship, and the parent () method are antagonistic

$ (' body '). Children (' div '). css ("Background", "#bbffaa"); and $ (' body > div ') is equivalent

$ (' body '). Children (). CSS ("Background", "#bbffaa"); Returns all child nodes of an element when no search criteria are found

$ (' body '). Children (' #abc '). CSS ("Background", "#bbffaa"); Find elements that do not exist return null

$ (' body '). Children (' #two-two '). CSS ("Background", "#bbffaa"); Finding a unique element returns the element

$ ('. One '). Children (). CSS ("Background", "#bbffaa"); class to find all the child nodes

$ ('. One '). Children (' #one-one '). CSS ("Background", "#bbffaa"); Class to find the only element

$ ('. One '). Children ('. Mini '). CSS ("Background", "#bbffaa"); Class Search Class

jquery Basic Learning 8--Hierarchy Selector Children () method