jQuery.fn = jQuery.prototype = {
     constructor: jQuery,
     init: function( selector, context, rootjQuery ) { },
    selector: "",       
    jquery: "1.7.2",       
    length: 0,       
    size: function() {},
    toArray: function() {},       
    get: function( num ) {},      
    pushStack: function( elems, name, selector ) {},      
    each: function( callback, args ) {},
    ready: function( fn ) { },
    eq: function( i ) {},
    first: function() {},
    last: function() { },
    slice: function() {},
    map: function( callback ) { },
    end: function() { },      
    push: push,
    sort: [].sort,
    splice: [].splice
        };

These are some of the properties and methods on the prototype of this version of jQuery. Selector: the selector used to record init arguments. But not necessarily equal. $(” div ”). The selector; / / “div” $(” div ”). The find (p). Selecctor; / / “div p”; This property is generally used for debugging. Jquery: the version number of jquery. Length: the number of elements. Size (): equivalent to length, which has less memory overhead. The remaining members are described in a later section.