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