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slugify Operator

9th May 2020 at 2:17pm
Filter Operators
purposereturns each item in the list in a human-readable form for use in URLs or filenames
inputa selection of titles
outputthe input titles transformed so that they only contain lower case letters, numbers, periods, dashes and underscores

New in: 5.1.23 The transformation applied by the slugify operator follows these steps:

  • If there is a tiddler with the same title that has a slug field, then return that field instead of running the following steps
  • Replace uppercase letters with lowercase equivalents
  • Transliterate diacritics to their basic lowercase ASCII equivalents (for example, "Æ" is transliterated to "AE")
  • Replace spaces with dashes
  • Remove all non-word characters except dashes and periods
  • Replace multiple sequential dashes with a single dash
  • Trim dashes from start and end
  • If the result is the empty string then character codes are used instead (eg. "&£@" transforms to "38-163-64")

Note that it is possible for more than one title to slugify to the same string. The duplicateslugs can be used to alert authors to any clashes.