Function dataAttr

2.0.3/2.0.3.js:3635–3662

( elem, key, data )

    });

    function dataAttr( elem, key, data ) {
        var name;

        // If nothing was found internally, try to fetch any
        // data from the HTML5 data-* attribute
        if ( data === undefined && elem.nodeType === 1 ) {
            name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();
            data = elem.getAttribute( name );

            if ( typeof data === "string" ) {
                try {
                    data = data === "true" ? true :
                        data === "false" ? false :
                            data === "null" ? null :
                                // Only convert to a number if it doesn't change the string
                                +data + "" === data ? +data :
                                    rbrace.test( data ) ? JSON.parse( data ) :
                                        data;
                } catch( e ) {}

                // Make sure we set the data so it isn't changed later
                data_user.set( elem, key, data );
            } else {
                data = undefined;
            }
        }
        return data;
    }
    jQuery.extend({
        queue: function( elem, type, data ) {
            var queue;