v3.1.0

• Support nunjucks.installJinjaCompat() with slim build. Fixes #1019

• Fix calling render callback twice when a conditional import throws an error. Solves #1029

• Support objects created with Object.create(null). fixes #468

• Support ESNext iterators, using Array.from. Merge of #1058

v3.0.1

• Fix handling methods and attributes of static arrays, objects and primitives. Solves the issue #937
• Add support for python-style array slices with Jinja compat enabled. Fixes #188; merge of #976.
• Fix call blocks having access to their parent scope. Fixes #906; merge of #994.
• Fix a bug that caused capturing block tags (e.g. set/endset, filter/endfilter) to write to the global buffer rather than capturing their contents. Fixes #914 and #972; merge of #990. Thanks Noah Lange.

v3.0.0

• Allow including many templates without reaching recursion limits. Merge of
  #787. Thanks Gleb Khudyakov.
• Allow explicitly setting null (aka none) as the value of a variable;
  don't ignore that value and look on up the frame stack or context. Fixes
  #478. Thanks Jonny Gerig
  Meyer for the report.
• Execute blocks in a child frame that can't write to its parent. This means
  that vars set inside blocks will not leak outside of the block, base
  templates can no longer see vars set in templates that inherit them, and
  super() can no longer set vars in its calling scope. Fixes the inheritance
  portion of #561, which
  fully closes that issue. Thanks legutierr for the report.
• Prevent macros from seeing or affecting their calling scope. Merge of
  #667.
• Fix handling of macro arg with default value which shares a name with another
  macro. Merge of #791.
• Add support for the spaces parameter in the dump template filter.
  Merge of #868.
  Thanks Jesse Eikema
• Add verbatim as an alias of raw for compatibility with Twig.
  Merge of #874.
• Add new nl2br filter. Thanks Marc-Aurèle Darche
• Add support for python's list.append with Jinja compat enabled. Thanks
  Conor Flannigan.
• Add variables whitespace control.

v2.5.2

• Call .toString in safe filter.
  Merge of #849.

v2.5.1

• Fix undefined and null behavior in escape and safe filter.
  Merge of #843.

v2.5.0

• Add elseif as an alias of elif for parity with Twig. Thanks kswedberg.
  Merge of #826.
• Add nunjucks env to express app settings as nunjucksEnv.
  Merge of #829.
• Add support for finding an object's "length" in length filter.
  Merge of #813.
• Ensure that precompiling on Windows still outputs POSIX-style path
  separators. Merge of #761.
• Add support for strict type check comparisons (=== and !===). Thanks
  oughter. Merge of #746.
• Allow full expressions (incl. filters) in import and from tags. Thanks legutierr.
  Merge of #710.
• OS agnostic file paths in precompile. Merge of #825.

v2.4.3

• Fix potential cast-related XSS vulnerability in autoescape mode, and with escape filter.
  Thanks Matt Austin for the report and Thomas Hunkapiller for the fix.
  #836

v2.4.2

• Fix use of in operator with strings. Fixes
  #714. Thanks Zubrik for the
  report.
• Support ES2015 Map and Set in length filter. Merge of
  #705. Thanks ricordisamoa.
• Remove truncation of long function names in error messages. Thanks Daniel
  Bendavid. Merge of #702.

v2.4.1

Pay careful attention to the escaping fixes in this release; the escape filter now won't double-escape strings that have already been escaped / marked safe. This matches the Jinja2 behavior.

• Don't double-escape. Thanks legutierr. Merge of
  #701.
• Prevent filter.escape from escaping SafeString. Thanks atian25. Merge of
  #623.
• Throw an error if a block is defined multiple times. Refs
  #696.
• Officially recommend the .njk extension. Thanks David Kebler. Merge of
  #691.
• Allow block-set to wrap an inheritance block. Unreported; fixed as a side
  effect of the fix for #576.
• Fix filter tag with non-trivial contents. Thanks Stefan Cruz and Fabien
  Franzen for report and investigation, Jan Oopkaup for failing tests. Fixes
  #576.

v2.4.0

Lots of great bugfixes and small new features in this release! Many thanks to all the contributors.

• Allow retrieving boolean-false as a global. Thanks Marius Büscher. Merge of
  #694.
• Don't automatically convert any for-loop that has an include statement into
  an async loop. Reverts
  7d4716f4fd, re-opens
  #372, fixes
  #527. Thanks Tom Delmas for
  the report.
• Switch from Optimist to Yargs for argument-parsing. Thanks Bogdan
  Chadkin. Merge of #672.
• Prevent includes from writing to their including scope. Merge of
  #667 (only partially
  backported to 2.x; macro var visibility not backported).
• Fix handling of dev environment option, to get full tracebacks on errors
  (including nunjucks internals). Thanks Tobias Petry and Chandrasekhar Ambula
  V for the report, Aleksandr Motsjonov for draft patch.
• Support using in operator to search in both arrays and objects,
  and it will throw an error for other data types.
  Fix #659.
  Thanks Alex Mayfield for report and test, Ouyang Yadong for fix.
  Merge of #661.
• Add support for {% set %} block assignments as in jinja2. Thanks Daniele
  Rapagnani. Merge of #656
• Fix {% set %} scoping within macros.
  Fixes #577 and
  the macro portion of #561.
  Thanks Ouyang Yadong. Merge of #653.
• Add support for named endblock (e.g. {% endblock foo %}). Thanks
  ricordisamoa. Merge of #641.
• Fix range global with zero as stop-value. Thanks Thomas Hunkapiller. Merge
  of #638.
• Fix a bug in urlize that collapsed whitespace. Thanks Paulo Bu. Merge of
  #637.
• Add sum filter. Thanks Pablo Matías Lazo. Merge of
  #629.
• Don't suppress errors inside {% if %} tags. Thanks Artemy Tregubenko for
  report and test, Ouyang Yadong for fix. Merge of
  #634.
• Allow whitespace control on comment blocks, too. Thanks Ouyang Yadong. Merge
  of #632.
• Fix whitespace control around nested tags/variables/comments. Thanks Ouyang
  Yadong. Merge of #631.