resources/jquery/jquery.suggestions.js

   1 /**
   2  * This plugin provides a generic way to add suggestions to a text box.
   3  *
   4  * Usage:
   5  *
   6  * Set options:
   7  *              $( '#textbox' ).suggestions( { option1: value1, option2: value2 } );
   8  *              $( '#textbox' ).suggestions( option, value );
   9  * Get option:
  10  *              value = $( '#textbox' ).suggestions( option );
  11  * Initialize:
  12  *              $( '#textbox' ).suggestions();
  13  *
  14  * Options:
  15  *
  16  * fetch(query): Callback that should fetch suggestions and set the suggestions property. Executed in the context of the
  17  *              textbox
  18  *              Type: Function
  19  * cancel: Callback function to call when any pending asynchronous suggestions fetches should be canceled.
  20  *              Executed in the context of the textbox
  21  *              Type: Function
  22  * special: Set of callbacks for rendering and selecting
  23  *              Type: Object of Functions 'render' and 'select'
  24  * result: Set of callbacks for rendering and selecting
  25  *              Type: Object of Functions 'render' and 'select'
  26  * $region: jQuery selection of element to place the suggestions below and match width of
  27  *              Type: jQuery Object, Default: $(this)
  28  * suggestions: Suggestions to display
  29  *              Type: Array of strings
  30  * maxRows: Maximum number of suggestions to display at one time
  31  *              Type: Number, Range: 1 - 100, Default: 7
  32  * delay: Number of ms to wait for the user to stop typing
  33  *              Type: Number, Range: 0 - 1200, Default: 120
  34  * submitOnClick: Whether to submit the form containing the textbox when a suggestion is clicked
  35  *              Type: Boolean, Default: false
  36  * maxExpandFactor: Maximum suggestions box width relative to the textbox width. If set to e.g. 2, the suggestions box
  37  *              will never be grown beyond 2 times the width of the textbox.
  38  *              Type: Number, Range: 1 - infinity, Default: 3
  39  * expandFrom: Which direction to offset the suggestion box from.
  40  *      Values 'start' and 'end' translate to left and right respectively depending on the directionality
  41  *      of the current document, according to $( 'html' ).css( 'direction' ).
  42  *      Type: String, default: 'auto', options: 'left', 'right', 'start', 'end', 'auto'.
  43  * positionFromLeft: Sets expandFrom=left, for backwards compatibility
  44  *              Type: Boolean, Default: true
  45  * highlightInput: Whether to hightlight matched portions of the input or not
  46  *              Type: Boolean, Default: false
  47  */
  48 ( function ( $ ) {
  49
  50 $.suggestions = {
  51         /**
  52          * Cancel any delayed updateSuggestions() call and inform the user so
  53          * they can cancel their result fetching if they use AJAX or something
  54          */
  55         cancel: function ( context ) {
  56                 if ( context.data.timerID !== null ) {
  57                         clearTimeout( context.data.timerID );
  58                 }
  59                 if ( $.isFunction( context.config.cancel ) ) {
  60                         context.config.cancel.call( context.data.$textbox );
  61                 }
  62         },
  63         /**
  64          * Restore the text the user originally typed in the textbox, before it was overwritten by highlight(). This
  65          * restores the value the currently displayed suggestions are based on, rather than the value just before
  66          * highlight() overwrote it; the former is arguably slightly more sensible.
  67          */
  68         restore: function ( context ) {
  69                 context.data.$textbox.val( context.data.prevText );
  70         },
  71         /**
  72          * Ask the user-specified callback for new suggestions. Any previous delayed call to this function still pending
  73          * will be canceled. If the value in the textbox is empty or hasn't changed since the last time suggestions were fetched, this
  74          * function does nothing.
  75          * @param {Boolean} delayed Whether or not to delay this by the currently configured amount of time
  76          */
  77         update: function ( context, delayed ) {
  78                 // Only fetch if the value in the textbox changed and is not empty
  79                 // if the textbox is empty then clear the result div, but leave other settings intouched
  80                 function maybeFetch() {
  81                         if ( context.data.$textbox.val().length === 0 ) {
  82                                 context.data.$container.hide();
  83                                 context.data.prevText = '';
  84                         } else if ( context.data.$textbox.val() !== context.data.prevText ) {
  85                                 if ( typeof context.config.fetch === 'function' ) {
  86                                         context.data.prevText = context.data.$textbox.val();
  87                                         context.config.fetch.call( context.data.$textbox, context.data.$textbox.val() );
  88                                 }
  89                         }
  90                 }
  91
  92                 // Cancel previous call
  93                 if ( context.data.timerID !== null ) {
  94                         clearTimeout( context.data.timerID );
  95                 }
  96                 if ( delayed ) {
  97                         // Start a new asynchronous call
  98                         context.data.timerID = setTimeout( maybeFetch, context.config.delay );
  99                 } else {
 100                         maybeFetch();
 101                 }
 102                 $.suggestions.special( context );
 103         },
 104         special: function ( context ) {
 105                 // Allow custom rendering - but otherwise don't do any rendering
 106                 if ( typeof context.config.special.render === 'function' ) {
 107                         // Wait for the browser to update the value
 108                         setTimeout( function () {
 109                                 // Render special
 110                                 var $special = context.data.$container.find( '.suggestions-special' );
 111                                 context.config.special.render.call( $special, context.data.$textbox.val() );
 112                         }, 1 );
 113                 }
 114         },
 115         /**
 116          * Sets the value of a property, and updates the widget accordingly
 117          * @param property String Name of property
 118          * @param value Mixed Value to set property with
 119          */
 120         configure: function ( context, property, value ) {
 121                 var newCSS;
 122                 // Validate creation using fallback values
 123                 switch( property ) {
 124                         case 'fetch':
 125                         case 'cancel':
 126                         case 'special':
 127                         case 'result':
 128                         case '$region':
 129                         case 'expandFrom':
 130                                 context.config[property] = value;
 131                                 break;
 132                         case 'suggestions':
 133                                 context.config[property] = value;
 134                                 // Update suggestions
 135                                 if ( context.data !== undefined ) {
 136                                         if ( context.data.$textbox.val().length === 0 ) {
 137                                                 // Hide the div when no suggestion exist
 138                                                 context.data.$container.hide();
 139                                         } else {
 140                                                 // Rebuild the suggestions list
 141                                                 context.data.$container.show();
 142                                                 // Update the size and position of the list
 143                                                 newCSS = {
 144                                                         top: context.config.$region.offset().top + context.config.$region.outerHeight(),
 145                                                         bottom: 'auto',
 146                                                         width: context.config.$region.outerWidth(),
 147                                                         height: 'auto'
 148                                                 };
 149
 150                                                 // Process expandFrom, after this it is set to left or right.
 151                                                 context.config.expandFrom = ( function ( expandFrom ) {
 152                                                         var regionWidth, docWidth, regionCenter, docCenter,
 153                                                                 docDir = $( document.documentElement ).css( 'direction' ),
 154                                                                 $region = context.config.$region;
 155
 156                                                         // Backwards compatible
 157                                                         if ( context.config.positionFromLeft ) {
 158                                                                 expandFrom = 'left';
 159
 160                                                         // Catch invalid values, default to 'auto'
 161                                                         } else if ( $.inArray( expandFrom, ['left', 'right', 'start', 'end', 'auto'] ) === -1 ) {
 162                                                                 expandFrom = 'auto';
 163                                                         }
 164
 165                                                         if ( expandFrom === 'auto' ) {
 166                                                                 if ( $region.data( 'searchsuggest-expand-dir' ) ) {
 167                                                                         // If the markup explicitly contains a direction, use it.
 168                                                                         expandFrom = $region.data( 'searchsuggest-expand-dir' );
 169                                                                 } else {
 170                                                                         regionWidth = $region.outerWidth();
 171                                                                         docWidth = $( document ).width();
 172                                                                         if ( ( regionWidth / docWidth  ) > 0.85 ) {
 173                                                                                 // If the input size takes up more than 85% of the document horizontally
 174                                                                                 // expand the suggestions to the writing direction's native end.
 175                                                                                 expandFrom = 'start';
 176                                                                         } else {
 177                                                                                 // Calculate the center points of the input and document
 178                                                                                 regionCenter = $region.offset().left + regionWidth / 2;
 179                                                                                 docCenter = docWidth / 2;
 180                                                                                 if ( Math.abs( regionCenter - docCenter ) / docCenter < 0.10 ) {
 181                                                                                         // If the input's center is within 10% of the document center
 182                                                                                         // use the writing direction's native end.
 183                                                                                         expandFrom = 'start';
 184                                                                                 } else {
 185                                                                                         // Otherwise expand the input from the closest side of the page,
 186                                                                                         // towards the side of the page with the most free open space
 187                                                                                         expandFrom = regionCenter > docCenter ? 'right' : 'left';
 188                                                                                 }
 189                                                                         }
 190                                                                 }
 191                                                         }
 192
 193                                                         if ( expandFrom === 'start' ) {
 194                                                                 expandFrom = docDir === 'rtl' ? 'right': 'left';
 195
 196                                                         } else if ( expandFrom === 'end' ) {
 197                                                                 expandFrom = docDir === 'rtl' ? 'left': 'right';
 198                                                         }
 199
 200                                                         return expandFrom;
 201
 202                                                 }( context.config.expandFrom ) );
 203
 204                                                 if ( context.config.expandFrom === 'left' ) {
 205                                                         // Expand from left
 206                                                         newCSS.left = context.config.$region.offset().left;
 207                                                         newCSS.right = 'auto';
 208                                                 } else {
 209                                                         // Expand from right
 210                                                         newCSS.left = 'auto';
 211                                                         newCSS.right = $( 'body' ).width() - ( context.config.$region.offset().left + context.config.$region.outerWidth() );
 212                                                 }
 213
 214                                                 context.data.$container.css( newCSS );
 215                                                 var $results = context.data.$container.children( '.suggestions-results' );
 216                                                 $results.empty();
 217                                                 var expWidth = -1;
 218                                                 var $autoEllipseMe = $( [] );
 219                                                 var matchedText = null;
 220                                                 for ( var i = 0; i < context.config.suggestions.length; i++ ) {
 221                                                         /*jshint loopfunc:true */
 222                                                         var text = context.config.suggestions[i];
 223                                                         var $result = $( '<div>' )
 224                                                                 .addClass( 'suggestions-result' )
 225                                                                 .attr( 'rel', i )
 226                                                                 .data( 'text', context.config.suggestions[i] )
 227                                                                 .mousemove( function ( e ) {
 228                                                                         context.data.selectedWithMouse = true;
 229                                                                         $.suggestions.highlight(
 230                                                                                 context, $(this).closest( '.suggestions-results div' ), false
 231                                                                         );
 232                                                                 } )
 233                                                                 .appendTo( $results );
 234                                                         // Allow custom rendering
 235                                                         if ( typeof context.config.result.render === 'function' ) {
 236                                                                 context.config.result.render.call( $result, context.config.suggestions[i] );
 237                                                         } else {
 238                                                                 // Add <span> with text
 239                                                                 if( context.config.highlightInput ) {
 240                                                                         matchedText = context.data.prevText;
 241                                                                 }
 242                                                                 $result.append( $( '<span>' )
 243                                                                                 .css( 'whiteSpace', 'nowrap' )
 244                                                                                 .text( text )
 245                                                                         );
 246
 247                                                                 // Widen results box if needed
 248                                                                 // New width is only calculated here, applied later
 249                                                                 var $span = $result.children( 'span' );
 250                                                                 if ( $span.outerWidth() > $result.width() && $span.outerWidth() > expWidth ) {
 251                                                                         // factor in any padding, margin, or border space on the parent
 252                                                                         expWidth = $span.outerWidth() + ( context.data.$container.width() - $span.parent().width());
 253                                                                 }
 254                                                                 $autoEllipseMe = $autoEllipseMe.add( $result );
 255                                                         }
 256                                                 }
 257                                                 // Apply new width for results box, if any
 258                                                 if ( expWidth > context.data.$container.width() ) {
 259                                                         var maxWidth = context.config.maxExpandFactor*context.data.$textbox.width();
 260                                                         context.data.$container.width( Math.min( expWidth, maxWidth ) );
 261                                                 }
 262                                                 // autoEllipse the results. Has to be done after changing the width
 263                                                 $autoEllipseMe.autoEllipsis( { hasSpan: true, tooltip: true, matchText: matchedText } );
 264                                         }
 265                                 }
 266                                 break;
 267                         case 'maxRows':
 268                                 context.config[property] = Math.max( 1, Math.min( 100, value ) );
 269                                 break;
 270                         case 'delay':
 271                                 context.config[property] = Math.max( 0, Math.min( 1200, value ) );
 272                                 break;
 273                         case 'maxExpandFactor':
 274                                 context.config[property] = Math.max( 1, value );
 275                                 break;
 276                         case 'submitOnClick':
 277                         case 'positionFromLeft':
 278                         case 'highlightInput':
 279                                 context.config[property] = value ? true : false;
 280                                 break;
 281                 }
 282         },
 283         /**
 284          * Highlight a result in the results table
 285          * @param result <tr> to highlight: jQuery object, or 'prev' or 'next'
 286          * @param updateTextbox If true, put the suggestion in the textbox
 287          */
 288         highlight: function ( context, result, updateTextbox ) {
 289                 var selected = context.data.$container.find( '.suggestions-result-current' );
 290                 if ( !result.get || selected.get( 0 ) !== result.get( 0 ) ) {
 291                         if ( result === 'prev' ) {
 292                                 if( selected.is( '.suggestions-special' ) ) {
 293                                         result = context.data.$container.find( '.suggestions-result:last' );
 294                                 } else {
 295                                         result = selected.prev();
 296                                         if ( selected.length === 0 ) {
 297                                                 // we are at the beginning, so lets jump to the last item
 298                                                 if ( context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
 299                                                         result = context.data.$container.find( '.suggestions-special' );
 300                                                 } else {
 301                                                         result = context.data.$container.find( '.suggestions-results div:last' );
 302                                                 }
 303                                         }
 304                                 }
 305                         } else if ( result === 'next' ) {
 306                                 if ( selected.length === 0 ) {
 307                                         // No item selected, go to the first one
 308                                         result = context.data.$container.find( '.suggestions-results div:first' );
 309                                         if ( result.length === 0 && context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
 310                                                 // No suggestion exists, go to the special one directly
 311                                                 result = context.data.$container.find( '.suggestions-special' );
 312                                         }
 313                                 } else {
 314                                         result = selected.next();
 315                                         if ( selected.is( '.suggestions-special' ) ) {
 316                                                 result = $( [] );
 317                                         } else if (
 318                                                 result.length === 0 &&
 319                                                 context.data.$container.find( '.suggestions-special' ).html() !== ''
 320                                         ) {
 321                                                 // We were at the last item, jump to the specials!
 322                                                 result = context.data.$container.find( '.suggestions-special' );
 323                                         }
 324                                 }
 325                         }
 326                         selected.removeClass( 'suggestions-result-current' );
 327                         result.addClass( 'suggestions-result-current' );
 328                 }
 329                 if ( updateTextbox ) {
 330                         if ( result.length === 0 || result.is( '.suggestions-special' ) ) {
 331                                 $.suggestions.restore( context );
 332                         } else {
 333                                 context.data.$textbox.val( result.data( 'text' ) );
 334                                 // .val() doesn't call any event handlers, so
 335                                 // let the world know what happened
 336                                 context.data.$textbox.change();
 337                         }
 338                         context.data.$textbox.trigger( 'change' );
 339                 }
 340         },
 341         /**
 342          * Respond to keypress event
 343          * @param key Integer Code of key pressed
 344          */
 345         keypress: function ( e, context, key ) {
 346                 var wasVisible = context.data.$container.is( ':visible' ),
 347                         preventDefault = false;
 348                 switch ( key ) {
 349                         // Arrow down
 350                         case 40:
 351                                 if ( wasVisible ) {
 352                                         $.suggestions.highlight( context, 'next', true );
 353                                         context.data.selectedWithMouse = false;
 354                                 } else {
 355                                         $.suggestions.update( context, false );
 356                                 }
 357                                 preventDefault = true;
 358                                 break;
 359                         // Arrow up
 360                         case 38:
 361                                 if ( wasVisible ) {
 362                                         $.suggestions.highlight( context, 'prev', true );
 363                                         context.data.selectedWithMouse = false;
 364                                 }
 365                                 preventDefault = wasVisible;
 366                                 break;
 367                         // Escape
 368                         case 27:
 369                                 context.data.$container.hide();
 370                                 $.suggestions.restore( context );
 371                                 $.suggestions.cancel( context );
 372                                 context.data.$textbox.trigger( 'change' );
 373                                 preventDefault = wasVisible;
 374                                 break;
 375                         // Enter
 376                         case 13:
 377                                 context.data.$container.hide();
 378                                 preventDefault = wasVisible;
 379                                 var selected = context.data.$container.find( '.suggestions-result-current' );
 380                                 if ( selected.length === 0 || context.data.selectedWithMouse ) {
 381                                         // if nothing is selected OR if something was selected with the mouse,
 382                                         // cancel any current requests and submit the form
 383                                         $.suggestions.cancel( context );
 384                                         context.config.$region.closest( 'form' ).submit();
 385                                 } else if ( selected.is( '.suggestions-special' ) ) {
 386                                         if ( typeof context.config.special.select === 'function' ) {
 387                                                 context.config.special.select.call( selected, context.data.$textbox );
 388                                         }
 389                                 } else {
 390                                         if ( typeof context.config.result.select === 'function' ) {
 391                                                 $.suggestions.highlight( context, selected, true );
 392                                                 context.config.result.select.call( selected, context.data.$textbox );
 393                                         } else {
 394                                                 $.suggestions.highlight( context, selected, true );
 395                                         }
 396                                 }
 397                                 break;
 398                         default:
 399                                 $.suggestions.update( context, true );
 400                                 break;
 401                 }
 402                 if ( preventDefault ) {
 403                         e.preventDefault();
 404                         e.stopImmediatePropagation();
 405                 }
 406         }
 407 };
 408 $.fn.suggestions = function () {
 409
 410         // Multi-context fields
 411         var returnValue,
 412                 args = arguments;
 413
 414         $(this).each( function () {
 415                 var context, key;
 416
 417                 /* Construction / Loading */
 418
 419                 context = $(this).data( 'suggestions-context' );
 420                 if ( context === undefined || context === null ) {
 421                         context = {
 422                                 config: {
 423                                         'fetch' : function () {},
 424                                         'cancel': function () {},
 425                                         'special': {},
 426                                         'result': {},
 427                                         '$region': $(this),
 428                                         'suggestions': [],
 429                                         'maxRows': 7,
 430                                         'delay': 120,
 431                                         'submitOnClick': false,
 432                                         'maxExpandFactor': 3,
 433                                         'expandFrom': 'auto',
 434                                         'highlightInput': false
 435                                 }
 436                         };
 437                 }
 438
 439                 /* API */
 440
 441                 // Handle various calling styles
 442                 if ( args.length > 0 ) {
 443                         if ( typeof args[0] === 'object' ) {
 444                                 // Apply set of properties
 445                                 for ( key in args[0] ) {
 446                                         $.suggestions.configure( context, key, args[0][key] );
 447                                 }
 448                         } else if ( typeof args[0] === 'string' ) {
 449                                 if ( args.length > 1 ) {
 450                                         // Set property values
 451                                         $.suggestions.configure( context, args[0], args[1] );
 452                                 } else if ( returnValue === null || returnValue === undefined ) {
 453                                         // Get property values, but don't give access to internal data - returns only the first
 454                                         returnValue = ( args[0] in context.config ? undefined : context.config[args[0]] );
 455                                 }
 456                         }
 457                 }
 458
 459                 /* Initialization */
 460
 461                 if ( context.data === undefined ) {
 462                         context.data = {
 463                                 // ID of running timer
 464                                 timerID: null,
 465
 466                                 // Text in textbox when suggestions were last fetched
 467                                 prevText: null,
 468
 469                                 // Number of results visible without scrolling
 470                                 visibleResults: 0,
 471
 472                                 // Suggestion the last mousedown event occured on
 473                                 mouseDownOn: $( [] ),
 474                                 $textbox: $(this),
 475                                 selectedWithMouse: false
 476                         };
 477
 478                         context.data.$container = $( '<div>' )
 479                                 .css( 'display', 'none' )
 480                                 .addClass( 'suggestions' )
 481                                 .append(
 482                                         $( '<div>' ).addClass( 'suggestions-results' )
 483                                                 // Can't use click() because the container div is hidden when the textbox loses focus. Instead,
 484                                                 // listen for a mousedown followed by a mouseup on the same div
 485                                                 .mousedown( function ( e ) {
 486                                                         context.data.mouseDownOn = $( e.target ).closest( '.suggestions-results div' );
 487                                                 } )
 488                                                 .mouseup( function ( e ) {
 489                                                         var $result = $( e.target ).closest( '.suggestions-results div' );
 490                                                         var $other = context.data.mouseDownOn;
 491                                                         context.data.mouseDownOn = $( [] );
 492                                                         if ( $result.get( 0 ) !== $other.get( 0 ) ) {
 493                                                                 return;
 494                                                         }
 495                                                         $.suggestions.highlight( context, $result, true );
 496                                                         context.data.$container.hide();
 497                                                         if ( typeof context.config.result.select === 'function' ) {
 498                                                                 context.config.result.select.call( $result, context.data.$textbox );
 499                                                         }
 500                                                         context.data.$textbox.focus();
 501                                                 } )
 502                                 )
 503                                 .append(
 504                                         $( '<div>' ).addClass( 'suggestions-special' )
 505                                                 // Can't use click() because the container div is hidden when the textbox loses focus. Instead,
 506                                                 // listen for a mousedown followed by a mouseup on the same div
 507                                                 .mousedown( function ( e ) {
 508                                                         context.data.mouseDownOn = $( e.target ).closest( '.suggestions-special' );
 509                                                 } )
 510                                                 .mouseup( function ( e ) {
 511                                                         var $special = $( e.target ).closest( '.suggestions-special' );
 512                                                         var $other = context.data.mouseDownOn;
 513                                                         context.data.mouseDownOn = $( [] );
 514                                                         if ( $special.get( 0 ) !== $other.get( 0 ) ) {
 515                                                                 return;
 516                                                         }
 517                                                         context.data.$container.hide();
 518                                                         if ( typeof context.config.special.select === 'function' ) {
 519                                                                 context.config.special.select.call( $special, context.data.$textbox );
 520                                                         }
 521                                                         context.data.$textbox.focus();
 522                                                 } )
 523                                                 .mousemove( function ( e ) {
 524                                                         context.data.selectedWithMouse = true;
 525                                                         $.suggestions.highlight(
 526                                                                 context, $( e.target ).closest( '.suggestions-special' ), false
 527                                                         );
 528                                                 } )
 529                                 )
 530                                 .appendTo( $( 'body' ) );
 531
 532                         $(this)
 533                                 // Stop browser autocomplete from interfering
 534                                 .attr( 'autocomplete', 'off')
 535                                 .keydown( function ( e ) {
 536                                         // Store key pressed to handle later
 537                                         context.data.keypressed = e.which;
 538                                         context.data.keypressedCount = 0;
 539
 540                                         switch ( context.data.keypressed ) {
 541                                                 // This preventDefault logic is duplicated from
 542                                                 // $.suggestions.keypress(), which sucks
 543                                                 case 40:
 544                                                         e.preventDefault();
 545                                                         e.stopImmediatePropagation();
 546                                                         break;
 547                                                 case 38:
 548                                                 case 27:
 549                                                 case 13:
 550                                                         if ( context.data.$container.is( ':visible' ) ) {
 551                                                                 e.preventDefault();
 552                                                                 e.stopImmediatePropagation();
 553                                                         }
 554                                         }
 555                                 } )
 556                                 .keypress( function ( e ) {
 557                                         context.data.keypressedCount++;
 558                                         $.suggestions.keypress( e, context, context.data.keypressed );
 559                                 } )
 560                                 .keyup( function ( e ) {
 561                                         // Some browsers won't throw keypress() for arrow keys. If we got a keydown and a keyup without a
 562                                         // keypress in between, solve it
 563                                         if ( context.data.keypressedCount === 0 ) {
 564                                                 $.suggestions.keypress( e, context, context.data.keypressed );
 565                                         }
 566                                 } )
 567                                 .blur( function () {
 568                                         // When losing focus because of a mousedown
 569                                         // on a suggestion, don't hide the suggestions
 570                                         if ( context.data.mouseDownOn.length > 0 ) {
 571                                                 return;
 572                                         }
 573                                         context.data.$container.hide();
 574                                         $.suggestions.cancel( context );
 575                                 } );
 576                 }
 577
 578                 // Store the context for next time
 579                 $(this).data( 'suggestions-context', context );
 580         } );
 581         return returnValue !== undefined ? returnValue : $(this);
 582 };
 583
 584 }( jQuery ) );