节点操作

append: function() {
    return this.domManip( arguments, function( elem ) {
        if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
            var target = manipulationTarget( this, elem );
            target.appendChild( elem );
        }
    });
},

prepend: function() {
    return this.domManip( arguments, function( elem ) {
        if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
            var target = manipulationTarget( this, elem );
            target.insertBefore( elem, target.firstChild );
        }
    });
},

before: function() {
    return this.domManip( arguments, function( elem ) {
        if ( this.parentNode ) {
            this.parentNode.insertBefore( elem, this );
        }
    });
},

after: function() {
    return this.domManip( arguments, function( elem ) {
        if ( this.parentNode ) {
            this.parentNode.insertBefore( elem, this.nextSibling );
        }
    });
},
replaceWith: function() {
    var arg = arguments[ 0 ];

    // Make the changes, replacing each context element with the new content
    this.domManip( arguments, function( elem ) {
        arg = this.parentNode;

        jQuery.cleanData( getAll( this ) );

        if ( arg ) {
            arg.replaceChild( elem, this );
        }
    });

    // Force removal if there was no new content (e.g., from empty arguments)
    return arg && (arg.length || arg.nodeType) ? this : this.remove();
},
domManip: function( args, callback ) {

    // Flatten any nested arrays
    args = concat.apply( [], args );

    var first, node, hasScripts,
        scripts, doc, fragment,
        i = 0,
        l = this.length,
        set = this,
        iNoClone = l - 1,
        value = args[0],
        isFunction = jQuery.isFunction( value );

    // We can‘t cloneNode fragments that contain checked, in WebKit
    if ( isFunction ||
            ( l > 1 && typeof value === "string" &&
                !support.checkClone && rchecked.test( value ) ) ) {
        return this.each(function( index ) {
            var self = set.eq( index );
            if ( isFunction ) {
                args[0] = value.call( this, index, self.html() );
            }
            self.domManip( args, callback );
        });
    }

    if ( l ) {
        fragment = jQuery.buildFragment( args, this[ 0 ].ownerDocument, false, this );
        first = fragment.firstChild;

        if ( fragment.childNodes.length === 1 ) {
            fragment = first;
        }

        if ( first ) {
            scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
            hasScripts = scripts.length;

            // Use the original fragment for the last item instead of the first because it can end up
            // being emptied incorrectly in certain situations (#8070).
            for ( ; i < l; i++ ) {
                node = fragment;

                if ( i !== iNoClone ) {
                    node = jQuery.clone( node, true, true );

                    // Keep references to cloned scripts for later restoration
                    if ( hasScripts ) {
                        jQuery.merge( scripts, getAll( node, "script" ) );
                    }
                }

                callback.call( this[i], node, i );
            }

            if ( hasScripts ) {
                doc = scripts[ scripts.length - 1 ].ownerDocument;

                // Reenable scripts
                jQuery.map( scripts, restoreScript );

                // Evaluate executable scripts on first document insertion
                for ( i = 0; i < hasScripts; i++ ) {
                    node = scripts[ i ];
                    if ( rscriptType.test( node.type || "" ) &&
                        !jQuery._data( node, "globalEval" ) && jQuery.contains( doc, node ) ) {

                        if ( node.src ) {
                            // Optional AJAX dependency, but won‘t run scripts if not present
                            if ( jQuery._evalUrl ) {
                                jQuery._evalUrl( node.src );
                            }
                        } else {
                            jQuery.globalEval( ( node.text || node.textContent || node.innerHTML || "" ).replace( rcleanScript, "" ) );
                        }
                    }
                }
            }

            // Fix #11809: Avoid leaking memory
            fragment = first = null;
        }
    }

    return this;
}

jQuery.each({
    appendTo: "append",
    prependTo: "prepend",
    insertBefore: "before",
    insertAfter: "after",
    replaceAll: "replaceWith"
}, function( name, original ) {
    jQuery.fn[ name ] = function( selector ) {
        var elems,
            i = 0,
            ret = [],
            insert = jQuery( selector ),
            last = insert.length - 1;

        for ( ; i <= last; i++ ) {
            elems = i === last ? this : this.clone(true);
            jQuery( insert[i] )[ original ]( elems );

            // Modern browsers can apply jQuery collections as arrays, but oldIE needs a .get()
            push.apply( ret, elems.get() );
        }

        return this.pushStack( ret );
    };
});

clone: function( elem, dataAndEvents, deepDataAndEvents ) {
    var destElements, node, clone, i, srcElements,
        inPage = jQuery.contains( elem.ownerDocument, elem );

    if ( support.html5Clone || jQuery.isXMLDoc(elem) || !rnoshimcache.test( "<" + elem.nodeName + ">" ) ) {
        clone = elem.cloneNode( true );

    // IE<=8 does not properly clone detached, unknown element nodes
    } else {
        fragmentDiv.innerHTML = elem.outerHTML;
        fragmentDiv.removeChild( clone = fragmentDiv.firstChild );
    }

    if ( (!support.noCloneEvent || !support.noCloneChecked) &&
            (elem.nodeType === 1 || elem.nodeType === 11) && !jQuery.isXMLDoc(elem) ) {

        // We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2
        destElements = getAll( clone );
        srcElements = getAll( elem );

        // Fix all IE cloning issues
        for ( i = 0; (node = srcElements[i]) != null; ++i ) {
            // Ensure that the destination node is not null; Fixes #9587
            if ( destElements[i] ) {
                fixCloneNodeIssues( node, destElements[i] );
            }
        }
    }

    // Copy the events from the original to the clone
    if ( dataAndEvents ) {
        if ( deepDataAndEvents ) {
            srcElements = srcElements || getAll( elem );
            destElements = destElements || getAll( clone );

            for ( i = 0; (node = srcElements[i]) != null; i++ ) {
                cloneCopyEvent( node, destElements[i] );
            }
        } else {
            cloneCopyEvent( elem, clone );
        }
    }

    // Preserve script evaluation history
    destElements = getAll( clone, "script" );
    if ( destElements.length > 0 ) {
        setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
    }

    destElements = srcElements = node = null;

    // Return the cloned set
    return clone;
}