resources/src/mediawiki/mediawiki.util.js

   1 ( function ( mw, $ ) {
   2         'use strict';
   3
   4         var util;
   5
   6         /**
   7          * Encode the string like PHP's rawurlencode
   8          * @ignore
   9          *
  10          * @param {string} str String to be encoded.
  11          * @return {string} Encoded string
  12          */
  13         function rawurlencode( str ) {
  14                 str = String( str );
  15                 return encodeURIComponent( str )
  16                         .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
  17                         .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
  18         }
  19
  20         /**
  21          * Private helper function used by util.escapeId*()
  22          * @ignore
  23          *
  24          * @param {string} str String to be encoded
  25          * @param {string} mode Encoding mode, see documentation for $wgFragmentMode
  26          *     in DefaultSettings.php
  27          * @return {string} Encoded string
  28          */
  29         function escapeIdInternal( str, mode ) {
  30                 str = String( str );
  31
  32                 switch ( mode ) {
  33                         case 'html5':
  34                                 return str.replace( / /g, '_' );
  35                         case 'html5-legacy':
  36                                 str = str.replace( /[ \t\n\r\f_'"&#%]+/g, '_' )
  37                                         .replace( /^_+|_+$/, '' );
  38                                 if ( str === '' ) {
  39                                         str = '_';
  40                                 }
  41                                 return str;
  42                         case 'legacy':
  43                                 return rawurlencode( str.replace( / /g, '_' ) )
  44                                         .replace( /%3A/g, ':' )
  45                                         .replace( /%/g, '.' );
  46                         default:
  47                                 throw new Error( 'Unrecognized ID escaping mode ' + mode );
  48                 }
  49         }
  50
  51         /**
  52          * Utility library
  53          * @class mw.util
  54          * @singleton
  55          */
  56         util = {
  57
  58                 /* Main body */
  59
  60                 /**
  61                  * Encode the string like PHP's rawurlencode
  62                  *
  63                  * @param {string} str String to be encoded.
  64                  * @return {string} Encoded string
  65                  */
  66                 rawurlencode: rawurlencode,
  67
  68                 /**
  69                  * Encode the string like Sanitizer::escapeId() in PHP
  70                  * @deprecated since 1.30 use escapeIdForAttribute() or escapeIdForLink()
  71                  *
  72                  * @param {string} str String to be encoded.
  73                  * @return {string} Encoded string
  74                  */
  75                 escapeId: function ( str ) {
  76                         return escapeIdInternal( str, 'legacy' );
  77                 },
  78
  79                 /**
  80                  * Encode string into HTML id compatible form suitable for use in HTML
  81                  * Analog to PHP Sanitizer::escapeIdForAttribute()
  82                  *
  83                  * @since 1.30
  84                  *
  85                  * @param {string} str String to encode
  86                  * @return {string} Encoded string
  87                  */
  88                 escapeIdForAttribute: function ( str ) {
  89                         var mode = mw.config.get( 'wgFragmentMode' )[ 0 ];
  90
  91                         return escapeIdInternal( str, mode );
  92                 },
  93
  94                 /**
  95                  * Encode string into HTML id compatible form suitable for use in links
  96                  * Analog to PHP Sanitizer::escapeIdForLink()
  97                  *
  98                  * @since 1.30
  99                  *
 100                  * @param {string} str String to encode
 101                  * @return {string} Encoded string
 102                  */
 103                 escapeIdForLink: function ( str ) {
 104                         var mode = mw.config.get( 'wgFragmentMode' )[ 0 ],
 105                                 id = escapeIdInternal( str, mode );
 106
 107                         if ( mode === 'html5' ) {
 108                                 id = encodeURIComponent( id ).replace( /%3A/g, ':' );
 109                         }
 110
 111                         return id;
 112                 },
 113
 114                 /**
 115                  * Encode page titles for use in a URL
 116                  *
 117                  * We want / and : to be included as literal characters in our title URLs
 118                  * as they otherwise fatally break the title.
 119                  *
 120                  * The others are decoded because we can, it's prettier and matches behaviour
 121                  * of `wfUrlencode` in PHP.
 122                  *
 123                  * @param {string} str String to be encoded.
 124                  * @return {string} Encoded string
 125                  */
 126                 wikiUrlencode: function ( str ) {
 127                         return util.rawurlencode( str )
 128                                 .replace( /%20/g, '_' )
 129                                 // wfUrlencode replacements
 130                                 .replace( /%3B/g, ';' )
 131                                 .replace( /%40/g, '@' )
 132                                 .replace( /%24/g, '$' )
 133                                 .replace( /%21/g, '!' )
 134                                 .replace( /%2A/g, '*' )
 135                                 .replace( /%28/g, '(' )
 136                                 .replace( /%29/g, ')' )
 137                                 .replace( /%2C/g, ',' )
 138                                 .replace( /%2F/g, '/' )
 139                                 .replace( /%7E/g, '~' )
 140                                 .replace( /%3A/g, ':' );
 141                 },
 142
 143                 /**
 144                  * Get the link to a page name (relative to `wgServer`),
 145                  *
 146                  * @param {string|null} [pageName=wgPageName] Page name
 147                  * @param {Object} [params] A mapping of query parameter names to values,
 148                  *  e.g. `{ action: 'edit' }`
 149                  * @return {string} Url of the page with name of `pageName`
 150                  */
 151                 getUrl: function ( pageName, params ) {
 152                         var titleFragmentStart, url, query,
 153                                 fragment = '',
 154                                 title = typeof pageName === 'string' ? pageName : mw.config.get( 'wgPageName' );
 155
 156                         // Find any fragment
 157                         titleFragmentStart = title.indexOf( '#' );
 158                         if ( titleFragmentStart !== -1 ) {
 159                                 fragment = title.slice( titleFragmentStart + 1 );
 160                                 // Exclude the fragment from the page name
 161                                 title = title.slice( 0, titleFragmentStart );
 162                         }
 163
 164                         // Produce query string
 165                         if ( params ) {
 166                                 query = $.param( params );
 167                         }
 168                         if ( query ) {
 169                                 url = title ?
 170                                         util.wikiScript() + '?title=' + util.wikiUrlencode( title ) + '&' + query :
 171                                         util.wikiScript() + '?' + query;
 172                         } else {
 173                                 url = mw.config.get( 'wgArticlePath' )
 174                                         .replace( '$1', util.wikiUrlencode( title ).replace( /\$/g, '$$$$' ) );
 175                         }
 176
 177                         // Append the encoded fragment
 178                         if ( fragment.length ) {
 179                                 url += '#' + util.escapeIdForLink( fragment );
 180                         }
 181
 182                         return url;
 183                 },
 184
 185                 /**
 186                  * Get address to a script in the wiki root.
 187                  * For index.php use `mw.config.get( 'wgScript' )`.
 188                  *
 189                  * @since 1.18
 190                  * @param {string} str Name of script (e.g. 'api'), defaults to 'index'
 191                  * @return {string} Address to script (e.g. '/w/api.php' )
 192                  */
 193                 wikiScript: function ( str ) {
 194                         str = str || 'index';
 195                         if ( str === 'index' ) {
 196                                 return mw.config.get( 'wgScript' );
 197                         } else if ( str === 'load' ) {
 198                                 return mw.config.get( 'wgLoadScript' );
 199                         } else {
 200                                 return mw.config.get( 'wgScriptPath' ) + '/' + str + '.php';
 201                         }
 202                 },
 203
 204                 /**
 205                  * Append a new style block to the head and return the CSSStyleSheet object.
 206                  * Use .ownerNode to access the `<style>` element, or use mw.loader#addStyleTag.
 207                  * This function returns the styleSheet object for convience (due to cross-browsers
 208                  * difference as to where it is located).
 209                  *
 210                  *     var sheet = util.addCSS( '.foobar { display: none; }' );
 211                  *     $( foo ).click( function () {
 212                  *         // Toggle the sheet on and off
 213                  *         sheet.disabled = !sheet.disabled;
 214                  *     } );
 215                  *
 216                  * @param {string} text CSS to be appended
 217                  * @return {CSSStyleSheet} Use .ownerNode to get to the `<style>` element.
 218                  */
 219                 addCSS: function ( text ) {
 220                         var s = mw.loader.addStyleTag( text );
 221                         return s.sheet || s.styleSheet || s;
 222                 },
 223
 224                 /**
 225                  * Grab the URL parameter value for the given parameter.
 226                  * Returns null if not found.
 227                  *
 228                  * @param {string} param The parameter name.
 229                  * @param {string} [url=location.href] URL to search through, defaulting to the current browsing location.
 230                  * @return {Mixed} Parameter value or null.
 231                  */
 232                 getParamValue: function ( param, url ) {
 233                         // Get last match, stop at hash
 234                         var     re = new RegExp( '^[^#]*[&?]' + mw.RegExp.escape( param ) + '=([^&#]*)' ),
 235                                 m = re.exec( url !== undefined ? url : location.href );
 236
 237                         if ( m ) {
 238                                 // Beware that decodeURIComponent is not required to understand '+'
 239                                 // by spec, as encodeURIComponent does not produce it.
 240                                 return decodeURIComponent( m[ 1 ].replace( /\+/g, '%20' ) );
 241                         }
 242                         return null;
 243                 },
 244
 245                 /**
 246                  * The content wrapper of the skin (e.g. `.mw-body`).
 247                  *
 248                  * Populated on document ready. To use this property,
 249                  * wait for `$.ready` and be sure to have a module dependency on
 250                  * `mediawiki.util` which will ensure
 251                  * your document ready handler fires after initialization.
 252                  *
 253                  * Because of the lazy-initialised nature of this property,
 254                  * you're discouraged from using it.
 255                  *
 256                  * If you need just the wikipage content (not any of the
 257                  * extra elements output by the skin), use `$( '#mw-content-text' )`
 258                  * instead. Or listen to mw.hook#wikipage_content which will
 259                  * allow your code to re-run when the page changes (e.g. live preview
 260                  * or re-render after ajax save).
 261                  *
 262                  * @property {jQuery}
 263                  */
 264                 $content: null,
 265
 266                 /**
 267                  * Add a link to a portlet menu on the page, such as:
 268                  *
 269                  * p-cactions (Content actions), p-personal (Personal tools),
 270                  * p-navigation (Navigation), p-tb (Toolbox)
 271                  *
 272                  * The first three parameters are required, the others are optional and
 273                  * may be null. Though providing an id and tooltip is recommended.
 274                  *
 275                  * By default the new link will be added to the end of the list. To
 276                  * add the link before a given existing item, pass the DOM node
 277                  * (e.g. `document.getElementById( 'foobar' )`) or a jQuery-selector
 278                  * (e.g. `'#foobar'`) for that item.
 279                  *
 280                  *     util.addPortletLink(
 281                  *         'p-tb', 'https://www.mediawiki.org/',
 282                  *         'mediawiki.org', 't-mworg', 'Go to mediawiki.org', 'm', '#t-print'
 283                  *     );
 284                  *
 285                  *     var node = util.addPortletLink(
 286                  *         'p-tb',
 287                  *         new mw.Title( 'Special:Example' ).getUrl(),
 288                  *         'Example'
 289                  *     );
 290                  *     $( node ).on( 'click', function ( e ) {
 291                  *         console.log( 'Example' );
 292                  *         e.preventDefault();
 293                  *     } );
 294                  *
 295                  * @param {string} portlet ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 296                  * @param {string} href Link URL
 297                  * @param {string} text Link text
 298                  * @param {string} [id] ID of the new item, should be unique and preferably have
 299                  *  the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 300                  * @param {string} [tooltip] Text to show when hovering over the link, without accesskey suffix
 301                  * @param {string} [accesskey] Access key to activate this link (one character, try
 302                  *  to avoid conflicts. Use `$( '[accesskey=x]' ).get()` in the console to
 303                  *  see if 'x' is already used.
 304                  * @param {HTMLElement|jQuery|string} [nextnode] Element or jQuery-selector string to the item that
 305                  *  the new item should be added before, should be another item in the same
 306                  *  list, it will be ignored otherwise
 307                  *
 308                  * @return {HTMLElement|null} The added element (a ListItem or Anchor element,
 309                  * depending on the skin) or null if no element was added to the document.
 310                  */
 311                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 312                         var $item, $link, $portlet, $ul;
 313
 314                         // Check if there's at least 3 arguments to prevent a TypeError
 315                         if ( arguments.length < 3 ) {
 316                                 return null;
 317                         }
 318                         // Setup the anchor tag
 319                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 320                         if ( tooltip ) {
 321                                 $link.attr( 'title', tooltip );
 322                         }
 323
 324                         // Select the specified portlet
 325                         $portlet = $( '#' + portlet );
 326                         if ( $portlet.length === 0 ) {
 327                                 return null;
 328                         }
 329                         // Select the first (most likely only) unordered list inside the portlet
 330                         $ul = $portlet.find( 'ul' ).eq( 0 );
 331
 332                         // If it didn't have an unordered list yet, create it
 333                         if ( $ul.length === 0 ) {
 334
 335                                 $ul = $( '<ul>' );
 336
 337                                 // If there's no <div> inside, append it to the portlet directly
 338                                 if ( $portlet.find( 'div:first' ).length === 0 ) {
 339                                         $portlet.append( $ul );
 340                                 } else {
 341                                         // otherwise if there's a div (such as div.body or div.pBody)
 342                                         // append the <ul> to last (most likely only) div
 343                                         $portlet.find( 'div' ).eq( -1 ).append( $ul );
 344                                 }
 345                         }
 346                         // Just in case..
 347                         if ( $ul.length === 0 ) {
 348                                 return null;
 349                         }
 350
 351                         // Unhide portlet if it was hidden before
 352                         $portlet.removeClass( 'emptyPortlet' );
 353
 354                         // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 355                         // and back up the selector to the list item
 356                         if ( $portlet.hasClass( 'vectorTabs' ) ) {
 357                                 $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 358                         } else {
 359                                 $item = $link.wrap( '<li></li>' ).parent();
 360                         }
 361
 362                         // Implement the properties passed to the function
 363                         if ( id ) {
 364                                 $item.attr( 'id', id );
 365                         }
 366
 367                         if ( accesskey ) {
 368                                 $link.attr( 'accesskey', accesskey );
 369                         }
 370
 371                         if ( tooltip ) {
 372                                 $link.attr( 'title', tooltip );
 373                         }
 374
 375                         if ( nextnode ) {
 376                                 // Case: nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 377                                 // Case: nextnode is a CSS selector for jQuery
 378                                 if ( nextnode.nodeType || typeof nextnode === 'string' ) {
 379                                         nextnode = $ul.find( nextnode );
 380                                 } else if ( !nextnode.jquery ) {
 381                                         // Error: Invalid nextnode
 382                                         nextnode = undefined;
 383                                 }
 384                                 if ( nextnode && ( nextnode.length !== 1 || nextnode[ 0 ].parentNode !== $ul[ 0 ] ) ) {
 385                                         // Error: nextnode must resolve to a single node
 386                                         // Error: nextnode must have the associated <ul> as its parent
 387                                         nextnode = undefined;
 388                                 }
 389                         }
 390
 391                         // Case: nextnode is a jQuery-wrapped DOM element
 392                         if ( nextnode ) {
 393                                 nextnode.before( $item );
 394                         } else {
 395                                 // Fallback (this is the default behavior)
 396                                 $ul.append( $item );
 397                         }
 398
 399                         // Update tooltip for the access key after inserting into DOM
 400                         // to get a localized access key label (T69946).
 401                         $link.updateTooltipAccessKeys();
 402
 403                         return $item[ 0 ];
 404                 },
 405
 406                 /**
 407                  * Validate a string as representing a valid e-mail address
 408                  * according to HTML5 specification. Please note the specification
 409                  * does not validate a domain with one character.
 410                  *
 411                  * FIXME: should be moved to or replaced by a validation module.
 412                  *
 413                  * @param {string} mailtxt E-mail address to be validated.
 414                  * @return {boolean|null} Null if `mailtxt` was an empty string, otherwise true/false
 415                  * as determined by validation.
 416                  */
 417                 validateEmail: function ( mailtxt ) {
 418                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 419
 420                         if ( mailtxt === '' ) {
 421                                 return null;
 422                         }
 423
 424                         // HTML5 defines a string as valid e-mail address if it matches
 425                         // the ABNF:
 426                         //     1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 427                         // With:
 428                         // - atext   : defined in RFC 5322 section 3.2.3
 429                         // - ldh-str : defined in RFC 1034 section 3.5
 430                         //
 431                         // (see STD 68 / RFC 5234 https://tools.ietf.org/html/std68)
 432                         // First, define the RFC 5322 'atext' which is pretty easy:
 433                         // atext = ALPHA / DIGIT / ; Printable US-ASCII
 434                         //     "!" / "#" /    ; characters not including
 435                         //     "$" / "%" /    ; specials. Used for atoms.
 436                         //     "&" / "'" /
 437                         //     "*" / "+" /
 438                         //     "-" / "/" /
 439                         //     "=" / "?" /
 440                         //     "^" / "_" /
 441                         //     "`" / "{" /
 442                         //     "|" / "}" /
 443                         //     "~"
 444                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 445
 446                         // Next define the RFC 1034 'ldh-str'
 447                         //     <domain> ::= <subdomain> | " "
 448                         //     <subdomain> ::= <label> | <subdomain> "." <label>
 449                         //     <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 450                         //     <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 451                         //     <let-dig-hyp> ::= <let-dig> | "-"
 452                         //     <let-dig> ::= <letter> | <digit>
 453                         rfc1034LdhStr = 'a-z0-9\\-';
 454
 455                         html5EmailRegexp = new RegExp(
 456                                 // start of string
 457                                 '^' +
 458                                 // User part which is liberal :p
 459                                 '[' + rfc5322Atext + '\\.]+' +
 460                                 // 'at'
 461                                 '@' +
 462                                 // Domain first part
 463                                 '[' + rfc1034LdhStr + ']+' +
 464                                 // Optional second part and following are separated by a dot
 465                                 '(?:\\.[' + rfc1034LdhStr + ']+)*' +
 466                                 // End of string
 467                                 '$',
 468                                 // RegExp is case insensitive
 469                                 'i'
 470                         );
 471                         return ( mailtxt.match( html5EmailRegexp ) !== null );
 472                 },
 473
 474                 /**
 475                  * Note: borrows from IP::isIPv4
 476                  *
 477                  * @param {string} address
 478                  * @param {boolean} allowBlock
 479                  * @return {boolean}
 480                  */
 481                 isIPv4Address: function ( address, allowBlock ) {
 482                         var block, RE_IP_BYTE, RE_IP_ADD;
 483
 484                         if ( typeof address !== 'string' ) {
 485                                 return false;
 486                         }
 487
 488                         block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '';
 489                         RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])';
 490                         RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 491
 492                         return ( new RegExp( '^' + RE_IP_ADD + block + '$' ).test( address ) );
 493                 },
 494
 495                 /**
 496                  * Note: borrows from IP::isIPv6
 497                  *
 498                  * @param {string} address
 499                  * @param {boolean} allowBlock
 500                  * @return {boolean}
 501                  */
 502                 isIPv6Address: function ( address, allowBlock ) {
 503                         var block, RE_IPV6_ADD;
 504
 505                         if ( typeof address !== 'string' ) {
 506                                 return false;
 507                         }
 508
 509                         block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '';
 510                         RE_IPV6_ADD =
 511                                 '(?:' + // starts with "::" (including "::")
 512                                         ':(?::|(?::' +
 513                                                 '[0-9A-Fa-f]{1,4}' +
 514                                         '){1,7})' +
 515                                         '|' + // ends with "::" (except "::")
 516                                         '[0-9A-Fa-f]{1,4}' +
 517                                         '(?::' +
 518                                                 '[0-9A-Fa-f]{1,4}' +
 519                                         '){0,6}::' +
 520                                         '|' + // contains no "::"
 521                                         '[0-9A-Fa-f]{1,4}' +
 522                                         '(?::' +
 523                                                 '[0-9A-Fa-f]{1,4}' +
 524                                         '){7}' +
 525                                 ')';
 526
 527                         if ( new RegExp( '^' + RE_IPV6_ADD + block + '$' ).test( address ) ) {
 528                                 return true;
 529                         }
 530
 531                         // contains one "::" in the middle (single '::' check below)
 532                         RE_IPV6_ADD =
 533                                 '[0-9A-Fa-f]{1,4}' +
 534                                 '(?:::?' +
 535                                         '[0-9A-Fa-f]{1,4}' +
 536                                 '){1,6}';
 537
 538                         return (
 539                                 new RegExp( '^' + RE_IPV6_ADD + block + '$' ).test( address ) &&
 540                                 /::/.test( address ) &&
 541                                 !/::.*::/.test( address )
 542                         );
 543                 },
 544
 545                 /**
 546                  * Check whether a string is an IP address
 547                  *
 548                  * @since 1.25
 549                  * @param {string} address String to check
 550                  * @param {boolean} allowBlock True if a block of IPs should be allowed
 551                  * @return {boolean}
 552                  */
 553                 isIPAddress: function ( address, allowBlock ) {
 554                         return util.isIPv4Address( address, allowBlock ) ||
 555                                 util.isIPv6Address( address, allowBlock );
 556                 }
 557         };
 558
 559         /**
 560          * @method wikiGetlink
 561          * @inheritdoc #getUrl
 562          * @deprecated since 1.23 Use #getUrl instead.
 563          */
 564         mw.log.deprecate( util, 'wikiGetlink', util.getUrl, 'Use mw.util.getUrl instead.' );
 565
 566         /**
 567          * Add the appropriate prefix to the accesskey shown in the tooltip.
 568          *
 569          * If the `$nodes` parameter is given, only those nodes are updated;
 570          * otherwise we update all elements with accesskeys on the page.
 571          *
 572          * @method updateTooltipAccessKeys
 573          * @param {Array|jQuery} [$nodes] A jQuery object, or array of nodes to update.
 574          * @deprecated since 1.24 Use the module jquery.accessKeyLabel instead.
 575          */
 576         mw.log.deprecate( util, 'updateTooltipAccessKeys', function ( $nodes ) {
 577                 if ( !$nodes ) {
 578                         $nodes = $( '[accesskey]' );
 579                 } else if ( !( $nodes instanceof $ ) ) {
 580                         $nodes = $( $nodes );
 581                 }
 582
 583                 $nodes.updateTooltipAccessKeys();
 584         }, 'Use jquery.accessKeyLabel instead.' );
 585
 586         /**
 587          * Add a little box at the top of the screen to inform the user of
 588          * something, replacing any previous message.
 589          * Calling with no arguments, with an empty string or null will hide the message
 590          *
 591          * @method jsMessage
 592          * @deprecated since 1.20 Use mw#notify
 593          * @param {Mixed} message The DOM-element, jQuery object or HTML-string to be put inside the message box.
 594          *  to allow CSS/JS to hide different boxes. null = no class used.
 595          */
 596         mw.log.deprecate( util, 'jsMessage', function ( message ) {
 597                 if ( !arguments.length || message === '' || message === null ) {
 598                         return true;
 599                 }
 600                 if ( typeof message !== 'object' ) {
 601                         message = $.parseHTML( message );
 602                 }
 603                 mw.notify( message, { autoHide: true, tag: 'legacy' } );
 604                 return true;
 605         }, 'Use mw.notify instead.' );
 606
 607         /**
 608          * Initialisation of mw.util.$content
 609          */
 610         function init() {
 611                 util.$content = ( function () {
 612                         var i, l, $node, selectors;
 613
 614                         selectors = [
 615                                 // The preferred standard is class "mw-body".
 616                                 // You may also use class "mw-body mw-body-primary" if you use
 617                                 // mw-body in multiple locations. Or class "mw-body-primary" if
 618                                 // you use mw-body deeper in the DOM.
 619                                 '.mw-body-primary',
 620                                 '.mw-body',
 621
 622                                 // If the skin has no such class, fall back to the parser output
 623                                 '#mw-content-text'
 624                         ];
 625
 626                         for ( i = 0, l = selectors.length; i < l; i++ ) {
 627                                 $node = $( selectors[ i ] );
 628                                 if ( $node.length ) {
 629                                         return $node.first();
 630                                 }
 631                         }
 632
 633                         // Should never happen... well, it could if someone is not finished writing a
 634                         // skin and has not yet inserted bodytext yet.
 635                         return $( 'body' );
 636                 }() );
 637         }
 638
 639         /**
 640          * Former public initialisation. Now a no-op function.
 641          *
 642          * @method util_init
 643          * @deprecated since 1.30
 644          */
 645         mw.log.deprecate( util, 'init', $.noop, 'Remove the call of mw.util.init().', 'mw.util.init' );
 646
 647         $( init );
 648
 649         mw.util = util;
 650         module.exports = util;
 651
 652 }( mediaWiki, jQuery ) );