The jquery filter filter (EXPR|OBJ|ELE|FN) filters out a collection of elements that match the specified expression, which is used to narrow the matching range, separating multiple expressions with commas

Filters out the collection of elements that match the specified expression, which is used to narrow the matching range, separating multiple expressions with commas

When a parameter is a function, the parameters inside the function are interpreted as follows:
A function is used as a collection of test elements. It accepts a parameter index, which is an element in the jquery collection. In the function, this refers to the current DOM element

Example: <! DOCTYPE html>

;} Html{font:15px/1.2em ' Courier New '; color: #666; width:750px;margin:25px auto;} div > p{white-space:pre-wrap;margin:15px 0;} Div>*{text-indent:8px;} . Hover{color: #FF96EC;}</style><script type= ' Text/javascript ' >    $(function(){        /*filters out the collection of elements that match the specified expression, which is used to narrow the range of matches, separating multiple expressions with commas when the argument is a function, the parameters inside the function are interpreted as follows: A function is used as a collection of test elements. It accepts a parameter index, which is an element in the jquery collection.        In the function, this refers to the current DOM element. */
$ (' div '). Filter ('. Selectordemofirst,.selectordemosecond '). addclass (' hover ');
        $(' Div '). Filter (function(index) {if($( This). Hasclass (' Selectordemofirst '))            return$( This); }). addclass (' Hover ') ; });</script>