v5.18.0

• [feature] New --print-config CLI flag (#4744)
• [bugfix] no-unnecessary-type-assertion no longer flags x! non-null assertions if --strictNullChecks is not enabled (#3724)
• [bugfix] quotemark handles unbalanced quotes more gracefully without crashing (#4344)
• [docs] Add tslint-playground link to README and bug report template (#4150)
• [enhancement] no-magic-numbers rule ignores arguments passed into default Number methods (#3668)
• [new-fixer] comment-format (#3583)
• [new-rule-option] "allow-trailing-lowercase" option for comment-format rule (#3583)
• [new-rule-option] "ignore-accessors" for adjacent-overload-signatures to ignore getters / setters overloads (#3718)
• [new-rule] no-async-without-await (#3945)
• [new-rule] strict-comparisons (#4519)

Thanks to our contributors!

• Josh Goldberg
• smoehrle
• Mateusz Witkowski
• Andy Hanson
• John Wiseheart
• Eran Shabi
• Tibor Blenessy
• AndreasGassmann
• Ryan Waskiewicz
• Isabelle

v5.17.0

• [bugfix] quotemark backtic option now ignores enum members, use strict declarations, lookup types, and strings containing octal escape sequences. (#4693)
• [bugfix] no-redundant-jsdoc no longer errors on JSDocThisTag (#4690)
• [chore] Update devDependency mocha from v3.2.0 to v6.1.4 (#4669) (#4674)
• [chore] Update devDependency js-yaml from ^3.13.0 to ^3.13.1 (#4663)
• [chore] Update deprecated devDependency github to @octokit/rest (#4673)
• [chore] Update devDependency nyc from v13.3.0 to v14.1.1 (#4699)
• [deprecation] no-use-before-declare rule for typescript >= 2.9.0 (#4695)
• [documentation] Minor fix for variable-name rule metadata (#4731)
• [documentation] Fixed no-unused-variable argument count (#4683)
• [enhancement] Allow const assertions in no-object-literal-type-assertion (#4681)
• [new-fixer] unnecessary-constructor (#4694)

Thanks to our contributors!

• Bjorn Stromberg
• Vitaliy Agoshkov
• knafteN
• Bowen Ni
• Waseem Ahmad
• Åsmund Grammeltvedt
• Eric Ferreira
• Zhen Tian
• Tom Lakesman
• zachkirsch

v5.16.0

• [bugfix] Excuse more quotemark backtick edge cases and fix behavior for TS < 2.7.1 (#4642)
• [bugfix] Fix regression in interface-name rule related to numeric characters in interface names (#4655, #4626)
• [enhancement] Update nyc from v10.2.0 to v13.3.0 (#4633)
• [enhancement] Migrate from deprecated babel-code-frame package to new @babel/code-frame package (#4632)
• [enhancement] Improve error message for restrict-plus-operands rule. (#4635)
• [enhancement] comment-format rule now whitelists //region comments generated by JetBrains IDE (#4609)
• [enhancement] Relax no-null-undefined-union rule. (#4625)
• [new-rule-option] allow-else-if option for unnecessary-else rule (#4599)
• [documentation] Fix "identifer" typo in custom rules docs (#4657)
• [documentation] Fix code example for switch-default rule (#4650)
• [documentation] Fix documentation example for prose formatter (#4656)
• [documentation] no-parameter-properties: fix unclear rule description (#4629)
• [documentation] Fix typo in rule docs generation (#4638)

Thanks to our contributors!

• Oleg Artene
• William Neely
• Bjorn Stromberg
• Matthew Barry
• Neha Rathi
• Vincent Langlet
• rarenal
• Greg Jednaszewski
• Adam Postma
• Eric Ferreira
• Evgeniy Timokhov
• Martin Probst

v5.15.0

• [api] WalkContext and AbstractWalker type parameter defaults to void (#2600)
• [bugfix] no-void-expression now allows conditional expressions (#4606)
• [bugfix] fix linebreak handling in ordered-imports (#4583)
• [bugfix] fix static-this false positive for higher order components (#4580)
• [bugfix] Fixed crash in unnecessary-else from blank if statements (#4603)
• [bugfix] Fixed false positive in unnecessary-else after non-jumping statement (#4603)
• [bugfix] interface-name now handles interface starting with "I18n" correctly (#4486)
• [bugfix] no-string-throw fix inserts whitespace if not present after throw keyword (#4540)
• [bugfix] quotemark: fix some edge cases for backtick option (#4618)
• [bugfix] unnecessary-constructor: don't flag non-private constructors that are actually necessary (#4619)
• [enhancement] Upgrade js-yaml to avoid security issue (#4595)
• [new-rule-option] allow-single-line-comments option for file-header rule (#4560)
• [new-rule-option] ignore-rest-args option for no-any rule (#4581)
• [new-rule] no-null-undefined-union (#4589)

Thanks to our contributors!

• Max Belsky
• Steve Moser
• Christian Flach
• Roman Rogowski
• Terry
• Luke
• Andy Hanson
• Vitalij Krotov
• Josh Goldberg
• Vincent Langlet
• Neha Rathi
• Eric Ferreira

v5.14.0

• [bugfix] backtick option for quotemark rule no longer incorrectly flags string literals that must use single/double quotes (#4535)
• [bugfix] Fixed regression in CheckstyleFormatter backwards compatibility (#4561)
• [bugfix] whitespace rule now lints export statements (#4554)
• [bugfix] no-trailing-whitespace no longer flags files starting with a byte order mark (#4543)
• [enhancement] promise-function-async now allows single statement lamda functions that delegate to another promise-returning function (#4553)
• [enhancement] Add note to docs about zero-indexing for machine formatters (#4544)
• [enhancement] Fix metadata of the whitespace rule (#4551)
• [enhancement] Add junit output for files which are successfully linted (#4566)
• [new-rule-option] underscore option for no-shadowed-variable rule to ignore shadowed underscores (#4546)
• [new-rule-option] require-const-for-all-caps option for variable-name rule (#2936)
• [new-rule-option] overloads option for completed-docs rule to enforce documentation of each overload signature (#4563)
• [new-rule-option] allow-namespace-imports option for no-duplicate-imports rule (#4524)
• [new-rule-option] allow-arguments option for no-object-literal-type-assertion rule to allow type assertions on object literals used inside call expressions (#4521)
• [new-rule-option] allow-delete option for no-unbound-method rule (#4548)
• [new-rule] no-tautology-expression (#4470)
• [new-rule] static-this (#4475)
• [new-rule] unnecessary-else (#4502)

Thanks to our contributors!

• Roman Rogowski
• Max Belsky
• Edward Drapkin
• Dominik Palo
• Matthew McCune
• Debsmita
• Lucas Charles
• Piotr Gajowniczek
• Darren Anderson
• Noam Yogev
• Josh Goldberg
• Karol Majewski

v5.13.1

• [bugfix] Fix regression in CheckstyleFormatter backwards compatibility (#4561)

v5.13.0

• [deprecation] Mark RuleWalker and ProgramAwareRuleWalker as deprecated (#4413)
• [bugfix] Create output directory when the output path (specified by --out CLI flag) does not exist. (#4507)
• [bugfix] Explicit disabling of rules is now copied over to jsRules when using jsRules: true (#4517)
• [bugfix] unknown is recognized as simple type in array-type (#4433)
• [bugfix] ban: Fix a false positive which would occur when banning method calls nested inside objects. Previously, banning ["a", "b", "c"] would trigger lint failures on the syntax b.c(), which was not the intent of this rule. (#4383)
• [bugfix] Fixed single-line comment parsing for completed-docs (#3557)
• [bugfix] trailing-comma no longer crashes if it cannot find the closing parenthesis of a function declaration (#4457)
• [bugfix] no-unsafe-any: allow implicitly downcasting any to unknown (#4442)
• [bugfix] Add grouped-imports to tslint:all (#4420)
• [docs] Fix docs typo (#4395)
• [enhancement] Add "formatting" rule category (#2832)
• [enhancement] ordered-imports now supports a groups option to provide custom grouping rules. (#4134)
• [enhancement] Convert completed-docs to an untyped rule (#3557)
• [enhancement] Checkstyle formatter includes every file linted regardless of lint errors. (#3838)
• [enhancement] Formatters now receive the full list of of linted file paths as a third argument. (#3838)
• [enhancement] array-type rule handles Typescript 3.0's unknown type properly (#4219)
• [enhancement] import-blacklist now supports regular expression patterns for blacklisting (#3504)
• [new-rule] no-restricted-globals (#3824)
• [new-fixer] added fixer for newline-before-return rule (#4482)
• [new-fixer] number-literal-format now includes auto fix (#4496)
• [new-rule-option] Added whitelist option to no-unbound-method (#4472)
• [new-rule-option] added jsx-ignore option to no-magic-numbers rule (#4460)
• [new-rule-option]: object-literal-sort-keys: Add match-declaration-order-only option (#3748)
• [new-rule-option] strict-boolean-expressions accepts ignore-rhs option to disable checking the right-hand side of the && and || operators as strictly boolean. (#4159)

Thanks to our contributors!

• Enes SOYLU
• jbsingh
• Sven Efftinge
• James C. Davis
• Norio Suzuki
• Thomas den Hollander
• Retsam
• Dobes Vandermeer
• Young Min Kim
• Grant Wu
• Felix Schindler
• Lydia
• Adrian Leonhard
• James Jensen
• Athene Noctua
• Allen
• Vincent Langlet
• Paul Medynski
• Liz
• Piotr Gajowniczek
• Max Sysoev
• Jakub Beneš
• Ian Mobley
• 周昊宇
• Nazanin Delam
• Matt R. Wilson
• Andy Hanson
• Zen
• Josh Goldberg
• Jeff Lau

5.12.1

🛠️ Bugfixes & enhancements

• [bugfix] Revert breaking change to tslint:recommended, update tslint:latest (#4404)
• [bugfix] Correcting fixer for the increment-decrement rule (#4415)
• [bugfix] Fix strict-type-predicates with unknown (#4444)
• [bugfix] Skip linting of .json files to avoid problems with --resolveJsonModule compiler option (#4001)
• [bugfix] fix some quotemark issues when using backticks with the avoid-template option (#4408)
• [enhancement] Mention file names in test script parse failures (#4397)

Thanks to our contributors!

• Young Min Kim
• Enes SOYLU
• Thomas den Hollander
• Adrian Leonhard

v5.12.0

🎉 Features

• [feature] Configure format from file (#4155)
• [feature] Make cli expect array for rules dir (#3788)
• [feature] Set js rules to all valid active rules (#3641)
• [improvement] Add tests for [email protected] and [email protected] (#4053)
• [new-fixer]type-literal-delimiter (#3964)
• [new-rule-option]whitespace Add whitespace rule for open braces (#4068)
• [new-rule-option]file-name-casing: Add file name whitelist (#4206)
• [new-rule-option]object-literal-sort-keys: locale-compare (#4193)
• [new-rule-option]strict-boolean-expressions adds allow-enum to allow using enums in boolean expressions (#3604)
• [new-rule-option]import-blacklist: support blacklisting specific named exports (#3926)
• [new-rule-option]type-literal-delimiter: Add { singleLine: "always" | "never"} (#3964)
• [new-rule-option]file-name-casing: Add snake-case option (#4081)
• [new-rule-option]file-header: Enforce Blank Line after File Header (#3740)
• [new-rule]ban-ts-ignore (#3728)
• [new-rule]function-constructor (#4198)
• [new-rule]increment-decrement (#3575)
• [new-rule]no-default-import (#4023)
• [new-rule]unnecessary-constructor (#3647)
• [new-rule]comment-type (#4008)
• [new-rule]unnecessary-bind (#3588)

🛠️ Bugfixes & enhancements

• [api] Allow exclude to work with node API (#4143)
• [api] Upgrade TSLint to support TS 3.1 (#4274)
• [bugfix] Allow whitelisted modules to start with @ symbol (#4192)
• [bugfix] Added exception for generators in return-undefined rule (#4370)
• [bugfix] Allow unknown in 'no-object-literal-type-assertion' rule. (#4362)
• [bugfix] Completed docs rule can check single-line comments (#3841)
• [bugfix]prefer-method-signature: Correct the auto-fix code of rule, now capable to handle multiline signature. (#4066)
• [bugfix] Default logger.error should log to stderr. (#3982)
• [bugfix] Fixes an issue where TSLint doesn't correctly resolve packages in a node_modules folder that are symlinked to another location where their dependencies are satisfied. (#4295)
• [bugfix] Fix configuration tests when comparing rules (#4346)
• [bugfix] Fix semicolon: Cannot read property 'initializer' of undefined (#4351)
• [bugfix] Fix whitespace rule in importClause with 'as' statement (#4249)
• [bugfix]no-invalid-this: fixes false positives on method-like syntax and false negatives on nested functions (#4034)
• [bugfix]one-line: Check block in a case clause (#3619)
• [bugfix]whitespace Don't require space between import and paren with in type imports (#4243)
• [bugfix] remove no-unused-variable from tslint:all (#4079)
• [bugfix]callable-types support interfaces containing a single construct signature (#4291) (#4352)
• [bugfix]ordered-imports: Setting import-sources-order: any no longer invalidates grouped-imports: true (#4374)
• [develop] Add issue templates (#4028)
• [develop] Add test for 3.0 (#4119)
• [develop] Changes the node version from 4 to 6 for TS 2.1 tests. (#4282)
• [develop] Fix prettier command in package.json (#4275)
• [develop] Fix semantic merge break from #4374 and #3733 (#4378)
• [develop] Fix typo in launch.json (#4287)
• [develop] Prettier (#4012)
• [develop] Re-ran Prettier on source files again, with some more ignores (#4270)
• [develop] Update 'json-stringify-pretty-compact' to 1.2.0 and remove unnecessary type declaration (#4371)
• [develop] Upgrade prettier and run over all files (#4214)
• [docs] "< 0" means less than zero, not greater than (#4183)
• [docs] Added badges for dependencies status (#4160)
• [docs] Additional code examples for rules (#3869)
• [docs] Clarify no-shadowed-variable doc (#4347)
• [docs] Fix docs typo (#4165)
• [docs] Fix docs typo (#4182)
• [docs] Fix typo in index.md (#4242)
• [docs] Fix typos in formatter descriptions (#4288)
• [docs] Fixed typo in documentation (#4047)
• [docs] Includes new name Azure DevOps for VSO (#4289)
• [docs] Typo correction in no-unused-expression (#4322)
• [docs] Update documentation to reflect changes made in #2229. (#4336)
• [docs] Update stylish example (#4095)
• [docs] Use latest docs deps to avoid vulnerable libs (#4366)
• [docs] prefer-object-spread: this is new to ES2018, not ES2015 (#4321)
• [documentation] Update configuration documentation to include array syntax (#4258)
• [enhancement] Add homepage to package.json (#4101)
• [enhancement] Add esSpecCompliant: true to recommended trailing-comma config (#4072)
• [enhancement] Add new tests to workflows (#4054)
• [enhancement] Add quiet flag to hide warnings (#4025)
• [enhancement] Don't flag unmatched ${ in no-invalid-template-strings (#3769)
• [enhancement] Show offending value in 'no-magic-numbers' error message (#4332)
• [enhancement]ordered-imports: When grouped-imports option of the rule is set, the fact that imports of the same type are all in one group is also checked. (#3733)
• [enhancement] Yaml parser now uses default schema, allowing for <<: to be used to merge anchors (#4350)
• [enhancement] Improve JUnit formatter (#4327)
• [enhancement] completed-docs: check properties and methods in interfaces (#4032)
• [enhancement] file-name-casing-rule supports regex expression for matching file (#4284)
• [enhancement] prose formatter uses line:column instead of [line, column] (#4222)
• [rule-change] Add "backtick" option for quotemark (#4029)
• [rule-change] Allow void expressions in binary expressions (#4323)

Thanks to our contributors!

• Shinigami
• Matthew Herbst
• Joshua R
• John Wiseheart
• Mitchell Wills
• Eric Ferreira
• Daniel Reichhart
• Rui
• Pavel Birukov
• Brian Schlenker
• Michael Black
• Andy Hanson
• atsu85
• PomanoB
• Oleg Vaskevich
• Daniel McNab
• Jan Pilzer
• Sebastian Silbermann
• Michael Lavina
• reduckted
• Ryan Waskiewicz
• Bowen Ni
• Josh Goldberg
• Erik
• Nathan
• Kevin Verdieck
• Joe Chung
• Peter Safranek
• Xavier Downs
• Igor Ovsiannikov
• RyosukeFukushima
• Andrew Boyton
• samuela
• stefanhamburger
• Carsten Dietzel
• Jakob Warkotsch
• Karthick Manoharan
• Ian Clanton-Thuon
• Yordis Prieto
• Mike Frysinger
• Dario Banfi
• Gérôme Grignon
• Antony74
• Morgan Zolob
• Young Min Kim
• rrogowski
• Eric Anderson
• Simon Marchi
• ulrichb
• Marvin Altemeier
• Ifiok Jr
• Andrew MacLeay
• Ethan
• Dan Homola
• NN
• Roman Rogowski

v5.11.0

⚠️ Deprecations

• [deprecation] no-unused-variable is deprecated because typescript now covers most of its functionality (#3919)

🎉 Features

• [new-rule] file-name-casing (#3978)
• [new-fixer] Add fixer for switch-final-break (#3615)
• [new-fixer] Implemented fixer for member-ordering and added corresponding tests. (#3935)
• [new-rule-option] Add whitelist for no-implicit-dependencies (#3979)

🛠️ Bugfixes & enhancements

• [bugfix] no-use-before-declare Fixes false positives when using the destructuring syntax (#3761) (#3876)
• [bugfix] Fix Copyright: @license JSDoc tag was missing (#3879)
• [bugfix] Fix missing newline at end of file (#3896)
• [bugfix] allow-empty-functions option of no-empty rule is now properly respecting empty methods (#3897)
• [bugfix] no-magic-numbers - support for negative zero (#3903)
• [bugfix] Handle tsconfig.json errors without using JSON.stringify (#3908)
• [bugfix] Fix CI: no-implicit-dependencies test failure; typescript@next failure (#4019)
• [bugfix] Fix edge case in no-console rule (#4041)
• [docs] Fix typos in the no-floating-promises rule docs. (#3886)
• [docs] Updated prefer-while docs to be semantically correct (#3888)
• [docs] Fix link to configuration page (#3891)
• [docs] Fix docs typo (#3898)
• [docs] Fix docs typo (#3910)
• [enhancement] Turn on strictPropertyInitialization for src/ and test/ (#3924)
• [enhancement] Use Buffer.allocUnsafe instead of the deprecated new Buffer() (#3985)
• [enhancement] Improve radix rule checks (#3901)
• [enhancement] Output +/- on diff so added/removed empty lines are visible. (#3973)
• [rule-change] no-implicit-dependencies now always considers peer dependencies (#3875)

Thanks to our contributors!

• Bowen Ni
• Peter Safranek
• Saugat Acharya
• Jason Mendes
• Ryan Waskiewicz
• Dariusz Rumiński
• Xinhu Liu
• Rado Kirov
• aervin_
• Josh Goldberg
• mertdeg2
• Jason Killian
• Adrian Leonhard
• david-cannady
• Andy Russell
• Tibor Blenessy
• Andrew Crites
• Pavel Birukov
• shalomdotnet