npm · #153 most downloaded on npm

espree

11.2.0703M downloads/moeslint/js ↗New releases in your daily digest, changelog included.

An Esprima-compatible JavaScript parser built on Acorn

Last release 7 months ago
06 Mar 2026
Release timing varies
gaps range from 2 weeks to 7 months
Nearly every release is documented
notes for 59 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
12 years old
103 releases · first in 2014

Release timeline

103 releases since 2014

20142016201820202022

Releases

11.2.06 Mar 20262 sources agree
allow top level using declaration in "commonjs"
11.2.0 (2026-03-04)

Features

allow top level using declaration in "commonjs" (#734) (3f7fb58)
Open source →
11.1.120 Feb 20262 sources agree
The following workspace dependencies were updated
11.1.1 (2026-02-20)

Bug Fixes

improve tree-shaking (#725) (b699f32)

update acorn, fix tests (#731) (883d4cc)

Dependencies

The following workspace dependencies were updated

dependencies

eslint-visitor-keys bumped from ^5.0.0 to ^5.0.1

From the same repository

eslint/js

One column per quarter.

11.1.019 Jan 20262 sources agree

restore comments property on tokenize() return value

11.1.0 (2026-01-18)

Features

add types to ESLint Scope (#709) (98caac0)
TypeScript support for Espree (#705) (5887c4d)

Bug Fixes

restore comments property on tokenize() return value (#721) (5603ea9)

Open source →

11.0.010 Nov 20252 sources agree

Program range span entire source text

11.0.0 (2025-11-07)

⚠ BREAKING CHANGES

Program range span entire source text (#677)
Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#696)

Features

Program range span entire source text (#677) (68bbb74)
Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#696) (9c84ecb)

Dependencies

The following workspace dependencies were updated
- dependencies
  - eslint-visitor-keys bumped from ^4.2.1 to ^5.0.0

Open source →

10.4.09 Jun 20252 sources agree

Add support for ES2026 using and await using declarations

10.4.0 (2025-06-09)

Features

Add support for ES2026 using and await using declarations (#658) (39e0865)

Dependencies

The following workspace dependencies were updated
- dependencies
  - eslint-visitor-keys bumped from ^4.2.0 to ^4.2.1

Open source →

10.3.029 Oct 20242 sources agree

add support for Import Attributes and RegExp Modifiers

10.3.0 (2024-10-29)

Features

add support for Import Attributes and RegExp Modifiers (#639) (2fd4222)

Dependencies

The following workspace dependencies were updated
- dependencies
  - eslint-visitor-keys bumped from ^4.1.0 to ^4.2.0

Open source →

10.2.027 Sept 20242 sources agree

Update dependencies to avoid build failure

10.2.0 (2024-09-27)

Features

add the eslint-scope package (#615) (2ecfb8b)

Bug Fixes

Update dependencies to avoid build failure (#631) (e8cd107)
update links to eslint/js repo (#619) (956389a)

Dependencies

The following workspace dependencies were updated
- dependencies
  - eslint-visitor-keys bumped from ^4.0.0 to ^4.1.0

Open source →

10.1.017 Jun 20242 sources agree

Support ES2025 and RegExp duplicate named capturing groups

10.1.0 (2024-06-17)

Features

Support ES2025 and RegExp duplicate named capturing groups (#608) (3059713)

Open source →

10.0.19 Feb 2024

upgrade eslint-visitor-keys@4.0.0

10.0.1 (2024-02-09)

Chores

upgrade eslint-visitor-keys@4.0.0 (#595) (6254a91)

Open source →

Additional notes

Chores

upgrade eslint-visitor-keys@4.0.0 (#595) (6254a91)

Open source →

10.0.026 Jan 20242 sources agree

Require Node.js ^18.18.0 || ^20.9.0 || >=21.1.0

10.0.0 (2024-01-25)

⚠ BREAKING CHANGES

Require Node.js ^18.18.0 || ^20.9.0 || >=21.1.0 (#589)

Features

Require Node.js ^18.18.0 || ^20.9.0 || >=21.1.0 (#589) (e79cfa4)

Bug Fixes

upgrade acorn v8.11.3 (#590) (6d30382)

Chores

Add PRs to triage project (#580) (086555e)
Remove add-to-triage (#583) (3907385)
run tests in Node.js 21 (#585) (1584ddb)
standardize npm script names (#582) (b0767ef)
use eslint-config-eslint@9.0.0 (#584) (ec949bc)

Open source →

9.6.114 Jul 20232 sources agree

generate provenance statements when release

9.6.1 (2023-07-14)

Chores

generate provenance statements when release (#579) (c1ef82c)
switch to eslint flat config (#577) (408eabd)

Open source →

9.6.030 Jun 20232 sources agree

Support ES2024 and regexp v flag

9.6.0 (2023-06-19)

Features

Support ES2024 and regexp v flag (#575) (4cfc062)

Open source →

9.5.25 May 2023

add npm install step to release-please workflow

9.5.2 (2023-05-05)

Chores

add npm install step to release-please workflow (#573) (d8900c1)
run tests on Node.js v20 (#571) (adf478e)
set up release-please (#569) (abda10f)
upgrade eslint-visitor-keys@3.4.1 (#574) (8e73f11)

Open source →

Additional notes

Chores

add npm install step to release-please workflow (#573) (d8900c1)
run tests on Node.js v20 (#571) (adf478e)
set up release-please (#569) (abda10f)
upgrade eslint-visitor-keys@3.4.1 (#574) (8e73f11)

v9.5.1 - March 28, 2023

91d48e9 chore: upgrade eslint-visitor-keys@3.4.0 (#568) (Milos Djermanovic)
37f6b17 fix: remove useless sourcemap url (fixes #566) (#567) (余腾靖)
5c85ea8 chore: Add lint-staged (#565) (coderaiser)

v9.5.0 - March 10, 2023

4368788 feat: Add parser name (#562) (Nicholas C. Zakas)
fe89a66 ci: use LTS node version in lint job (#561) (Nitin Kumar)
5a70a0b chore: Add triage action (#560) (Nicholas C. Zakas)

v9.4.1 - November 6, 2022

ecb6cde ci: add node v19 (#558) (Koichi ITO)
30f5f2f docs: update README for ECMAScript 2023 (#557) (Sosuke Suzuki)

v9.4.0 - August 26, 2022

411d697 feat: Support ES2023 and hashbangs (#556) (Brandon Mills)

v9.3.3 - July 31, 2022

b1eac6d fix: don't recognize directives in ES3, allow parenthesized rest target (#554) (Milos Djermanovic)
bd3b5c6 ci: update github actions (#552) (Amaresh S M)
45fec88 chore: update package.json (#550) (Deepshika S)

v9.3.2 - May 6, 2022

6c718af fix: "use strict" should not trigger strict mode in es3. (#547) (唯然)
e5982ef chore: lint tool files, add editorconfig, update devDeps. (#545) (Brett Zamir)
75f65eb build: add node v18 (#546) (唯然)
b578a66 chore: remove unused devDependencies (#540) (Nitin Kumar)
770b577 chore: add LICENSE file for tests (#539) (Nitin Kumar)
c915190 docs: update Build Status badge (#536) (Milos Djermanovic)

v9.3.1 - February 11, 2022

37f2184 chore: Upgrade to eslint-visitor-keys@3.3.0 (#535) (Milos Djermanovic)
64010de fix: Derive espree.Syntax from espree.VisitorKeys (#532) (Frank Weigel)
ea0cf6a chore: switch from nyc to c8 for ESM coverage (#534) (Brett Zamir)
9fbe22a chore: upgrade eslint-visitor-keys@3.2.0 (#533) (Milos Djermanovic)

v9.3.0 - December 31, 2021

8655f3d feat: support arbitrary module namespace names (#528) (Milos Djermanovic)
1b72d7a ci: use node v16 for macOS and windows jobs (#527) (Nitin Kumar)

v9.2.0 - December 3, 2021

1c4a04d ci: use node v16 (#524) (Nitin Kumar)
e807c20 feat: add allowReserved for ES3 (#522) (Jordan Harband)
34b9a6a docs: add private-in syntax (#523) (Milos Djermanovic)

v9.1.0 - November 20, 2021

27713ac feat: Add sourceType:commonjs support (#520) (Nicholas C. Zakas)
6839389 feat: support for private-in syntax (#521) (Yosuke Ota)
fe07aae feat: support class static blocks (#518) (Milos Djermanovic)
c0a8aa2 build: upgrade eslint-release to v3.2.0 to support conventional commits (#517) (Milos Djermanovic)
6be7bcb Build: add node v17 (#516) (唯然)
93b24dd Chore: add class static blocks tests (#515) (薛定谔的猫)

v9.0.0 - September 10, 2021

7952c6f Breaking: Disallow reserved words in ES3 (#513) (Nicholas C. Zakas)
ee1d3ec Fix: 0x2028 and 0x2029 in string literals should increment line number (#514) (Milos Djermanovic)
63bd0bc Chore: use actions/setup-node@v2 (#510) (薛定谔的猫)
bf57077 Chore: Remove obsolete lib/visitor-keys.js (#509) (Matthias Oßwald)

v8.0.0 - June 29, 2021

c335413 Upgrade: eslint-visitor-keys@3.0.0 (#507) (Milos Djermanovic)
e08c9d7 8.0.0-beta.1 (ESLint Jenkins)
c8976d6 Build: changelog update for 8.0.0-beta.1 (ESLint Jenkins)
e207bd7 Update: Support top-level await and regexp match indices (#505) (Nicholas C. Zakas)
9eff2c7 Update: reset default ecmaVersion to 5 (#506) (Nicholas C. Zakas)
c8ca49a 8.0.0-beta.0 (ESLint Jenkins)
997956b Build: changelog update for 8.0.0-beta.0 (ESLint Jenkins)
d017d38 Breaking: drop node v10/13/v15 (fixes #501) (#502) (薛定谔的猫)
e71162c Update: add class fields (refs eslint/eslint#14343) (#486) (Toru Nagashima)
b068cea Breaking: Implement 'ecmaVersion: latest' (fixes #495) (#499) (Nicholas C. Zakas)
8294427 Upgrade: eslint-release@3.1.2 (#494) (Milos Djermanovic)
4c1f17d Chore: Refactor TemplateElement range fix (#489) (fisker Cheung)
6ffd604 Chore: Improve readability of Program position fix part (#493) (fisker Cheung)
94508b7 Upgrade: acorn to 8.2.2 (fixes #472) (#492) (薛定谔的猫)
864a73e Chore: fix incorrect comment (#491) (薛定谔的猫)
34e1ab9 Chore: Add tests and comments (refs #349) (#487) (Nicholas C. Zakas)
dffb7aa Breaking: syncing start/end with range (fixes #349) (#461) (Anix)
e86f386 Chore: remove --legacy-peer-deps for Node 15 (#485) (Milos Djermanovic)
ecaf510 Build: add node v16 (#481) (薛定谔的猫)
b8d35ed Chore: rm devdep leche (fixes #480) (#482) (薛定谔的猫)
651e204 Chore: Fix/remove tools (fixes #471) (#476) (Nicholas C. Zakas)
671c3aa Docs: Update README with ESM instructions (fixes #474) (#477) (Nicholas C. Zakas)
8209e4e Build: Update scripts for release (fixes #475) (#478) (Nicholas C. Zakas)
5dd3dee Build: Update branch reference in CI (#479) (Nicholas C. Zakas)
995d2a8 Breaking: acorn to 8.1.0 (fixes #470) (#473) (薛定谔的猫)
8234c48 Breaking: provide ESM export (refs eslint/rfcs#72) (#469) (Mike Reinstein)
2080ce6 Chore: Test on Node 15.x (#468) (Milos Djermanovic)
fc384a4 Upgrade: eslint devDependencies (#467) (Milos Djermanovic)
1a8ec00 Build: remove browserify script (#466) (Milos Djermanovic)
3b4ca9e Chore: Add test for valid non-string input (#463) (stonegray)
1b99259 Upgrade: eslint-visitor-keys@2.0.0 (#462) (Milos Djermanovic)

v8.0.0-beta.1 - June 24, 2021

e207bd7 Update: Support top-level await and regexp match indices (#505) (Nicholas C. Zakas)
9eff2c7 Update: reset default ecmaVersion to 5 (#506) (Nicholas C. Zakas)

v8.0.0-beta.0 - June 11, 2021

d017d38 Breaking: drop node v10/13/v15 (fixes #501) (#502) (薛定谔的猫)
e71162c Update: add class fields (refs eslint/eslint#14343) (#486) (Toru Nagashima)
b068cea Breaking: Implement 'ecmaVersion: latest' (fixes #495) (#499) (Nicholas C. Zakas)
8294427 Upgrade: eslint-release@3.1.2 (#494) (Milos Djermanovic)
4c1f17d Chore: Refactor TemplateElement range fix (#489) (fisker Cheung)
6ffd604 Chore: Improve readability of Program position fix part (#493) (fisker Cheung)
94508b7 Upgrade: acorn to 8.2.2 (fixes #472) (#492) (薛定谔的猫)
864a73e Chore: fix incorrect comment (#491) (薛定谔的猫)
34e1ab9 Chore: Add tests and comments (refs #349) (#487) (Nicholas C. Zakas)
dffb7aa Breaking: syncing start/end with range (fixes #349) (#461) (Anix)
e86f386 Chore: remove --legacy-peer-deps for Node 15 (#485) (Milos Djermanovic)
ecaf510 Build: add node v16 (#481) (薛定谔的猫)
b8d35ed Chore: rm devdep leche (fixes #480) (#482) (薛定谔的猫)
651e204 Chore: Fix/remove tools (fixes #471) (#476) (Nicholas C. Zakas)
671c3aa Docs: Update README with ESM instructions (fixes #474) (#477) (Nicholas C. Zakas)
8209e4e Build: Update scripts for release (fixes #475) (#478) (Nicholas C. Zakas)
5dd3dee Build: Update branch reference in CI (#479) (Nicholas C. Zakas)
995d2a8 Breaking: acorn to 8.1.0 (fixes #470) (#473) (薛定谔的猫)
8234c48 Breaking: provide ESM export (refs eslint/rfcs#72) (#469) (Mike Reinstein)
2080ce6 Chore: Test on Node 15.x (#468) (Milos Djermanovic)
fc384a4 Upgrade: eslint devDependencies (#467) (Milos Djermanovic)
1a8ec00 Build: remove browserify script (#466) (Milos Djermanovic)
3b4ca9e Chore: Add test for valid non-string input (#463) (stonegray)
1b99259 Upgrade: eslint-visitor-keys@2.0.0 (#462) (Milos Djermanovic)

v7.3.1 - December 5, 2020

fef6f4a Upgrade: acorn-jsx@5.3.1 (#459) (Milos Djermanovic)
0e09d9a Chore: Add tests for ecmaVersion default value (#460) (Milos Djermanovic)
4c70052 Docs: Fix some minor typos in the READMEs (#455) (Noah Doersing)

v7.3.0 - August 22, 2020

4ba3eef Chore: move to GitHub Actions (#449) (Kai Cataldo)
bd0a405 Update: support logical assignment and numeric separators (#448) (Toru Nagashima)

v7.2.0 - July 17, 2020

91c2d58 Docs: Add security policy (#447) (Nicholas C. Zakas)
872645c Update: support optional chaining (#446) (Toru Nagashima)
0cc7800 Docs: Clean up LICENSE file (#445) (Nicholas C. Zakas)

v7.1.0 - June 4, 2020

75e80bc Update: support ?? operator, import.meta, and export * as ns (#441) (Toru Nagashima)
ad0543c Chore: added fixlint in Makefile.js (#440) (Anix)

v7.0.0 - May 7, 2020

8fe2efc Breaking: drop Node v8 support (#429) (Kai Cataldo)
6048bfe Docs: documenting public API (fixes #431) (#442) (Anix)
9a4cff3 Chore: added tests for options normalize (#439) (Anix)
99707f3 Chore: added lockfiles to .gitignore (#438) (Anix)
9b91bcc Docs: new site for docs (#436) (Anix)

v6.2.1 - March 10, 2020

d6d7480 Upgrade: acorn 7.1.1, Regex DOS vuln (fixes #435) (#434) (James)

v6.2.0 - March 2, 2020

ced1b68 Update: update acorn-jsx and fix failing test (#432) (Kai Cataldo)
acb8776 Update: add latestEcmaVersion & supportedEcmaVersions (#430) (Kai Cataldo)

v6.1.2 - October 20, 2019

70c4970 Fix: misuse token types (fixes #393, refs eslint/eslint#11018) (#426) (Toru Nagashima)

v6.1.1 - August 23, 2019

ba81546 Upgrade: dev deps to latest (#424) (薛定谔的猫)
bbe0119 Upgrade: acorn-jsx@5.0.2 (#423) (薛定谔的猫)
c0635ba Docs: update readme to mention ES2020 (#422) (Kai Cataldo)

v6.1.0 - August 18, 2019

9870c55 Update: improve error messaging when validating ecmaVersion (#421) (Kai Cataldo)
3f49224 Fix: tokenize the latest right curly brace (fixes #403) (#419) (finico)
f5e58cc Update: support bigint and dynamic import (#415) (Toru Nagashima)

v6.0.0 - June 21, 2019

a988a36 Build: add node 12 (#414) (薛定谔的猫)

v6.0.0-alpha.0 - April 12, 2019

493d464 Breaking: validate parser options (fixes #384) (#412) (薛定谔的猫)

v5.0.1 - February 15, 2019

c40e2fc Upgrade: acorn@6.0.7 (#407) (Kai Cataldo)

v5.0.0 - December 5, 2018

1bcd563 Breaking: remove attachComment (#405) (Kai Cataldo)
35623ee Chore: update linting config (#406) (Kai Cataldo)
4b86a7d Build: add node 11 (#400) (薛定谔的猫)
7c278d6 Fix: build failing due to incorrectly super() call (fixes #398) (#399) (薛定谔的猫)
6ebc219 Upgrade: eslint & eslint-config-eslint (#387) (薛定谔的猫)

v4.1.0 - October 24, 2018

8eadb88 Upgrade: acorn 6, acorn-jsx 5, and istanbul (#391) (Toru Nagashima)
0f2edb8 Upgrade: eslint-release@1.0.0 (#392) (Teddy Katz)
560b6f7 Update: VisitorKeys depend on eslint-visitor-keys (#389) (othree)
6bf2ebf Docs: Fix some typos in the README (#386) (Hugo Locurcio)

v4.0.0 - June 21, 2018

v4.0.0-rc.0 - June 9, 2018

d8224c4 Build: Adding rc release script to package.json (#383) (Kevin Partington)
4207773 Build: add node 10 (#381) (薛定谔的猫)
cd9da7e Update: upgrade acorn to support two ES2019 syntax (#380) (Toru Nagashima)
8cb3ceb Chore: remove Object.assign polyfill (#382) (薛定谔的猫)

v4.0.0-alpha.1 - May 28, 2018

56c5a9c Fix: remove workarounds for acorn < 4 (#372) (Rouven Weßling)
fd305e5 Upgrade: eslint-release to v0.11.1 (#376) (Teddy Katz)

v4.0.0-alpha.0 - March 30, 2018

95fa890 Build: fix typos in package.json release scripts (#375) (Teddy Katz)
6284e09 Breaking: remove experimentalObjectRestSpread option (#374) (Teddy Katz)
0df063f Breaking: require Node.js 6+, upgrade acorn-jsx@4.1.1 (fixes #345) (#371) (薛定谔的猫)
0252144 Upgrade: acorn 5.5.1 (#370) (Rouven Weßling)

v3.5.4 - March 4, 2018

706167b Upgrade: acorn 5.5.0 (#369) (Toru Nagashima)

v3.5.3 - February 2, 2018

70f9859 Upgrade: acorn 5.4.0 (#367) (Toru Nagashima)
cea4823 Chore: Adding .gitattributes file (#366) (Kevin Partington)
4160aee Upgrade: acorn v5.3.0 (#365) (Toru Nagashima)

v3.5.2 - November 10, 2017

019b70a Fix: Remove blockBindings from docs (fixes #307, fixes #339) (#356) (Jan Pilzer)
b2016cb Chore: refactoring rest/spread properties (#361) (Toru Nagashima)
59c9d06 Chore: upgrade acorn@5.2 (fixes #358) (#360) (Toru Nagashima)
06c35c9 Chore: add .npmrc (#359) (Toru Nagashima)

v3.5.1 - September 15, 2017

5eb1388 Fix: Fix parsing of async keyword-named object methods (#352) (#353) (Mark Banner)

v3.5.0 - August 5, 2017

4d442a1 Update: add initial support for ES2018 (#348) (Teddy Katz)
d4bdcb6 Fix: Make template token objects adhere to token object structure (#343) (Ian Christian Myers)
9ac671a Upgrade: acorn to 5.1.1 (#347) (Teddy Katz)
16e1fec Docs: Specify default values of options (fixes #325) (#342) (Jan Pilzer)
be85b8e Fix: async shorthand properties (fixes #340) (#341) (Toru Nagashima)

v3.4.3 - May 5, 2017

343590a Fix: add AwaitExpression to espree.Syntax (fixes #331) (#332) (Teddy Katz)

v3.4.2 - April 21, 2017

c99e436 Upgrade: eslint to 2.13.1 (#328) (Teddy Katz)
628cf3a Fix: don't mutate user-provided configs (fixes #329) (#330) (Teddy Katz)

v3.4.1 - March 31, 2017

a3ae0bd Upgrade: acorn to 5.0.1 (#327) (Teddy Katz)
15ef24f Docs: Add badges (#326) (Jan Pilzer)
652990a Fix: raise error for trailing commas after rest properties (fixes #310) (#323) (Teddy Katz)
9d86ba5 Upgrade: acorn to ^4.0.11 (#317) (Toru Nagashima)
a3442b5 Chore: fix tests for Node 6+ (#315) (Teddy Katz)

v3.4.0 - February 2, 2017

f55fa51 Build: Lock acorn to v4.0.4 (#314) (Kai Cataldo)
58f75be Fix:generic error for invalid ecmaVersion(fixes eslint#7405) (#303) (Scott Stern)
d6b383d Docs: Update license copyright (Nicholas C. Zakas)
e5df542 Update: To support year in ecmaVersion number (fixes #300) (#301) (Gyandeep Singh)

v3.3.2 - September 29, 2016

7d3e2fc Fix: reset isAsync flag for each property (fixes #298) (#299) (Toru Nagashima)

v3.3.1 - September 26, 2016

80abdce Fix: } token followed by template had been lost (fixes #293) (#294) (Toru Nagashima)
9810bab Fix: parsing error on async as property name. (#295) (Toru Nagashima)

v3.3.0 - September 20, 2016

92b04b1 Update: create-test script (fixes #291) (#292) (Jamund Ferguson)

v3.2.0 - September 16, 2016

5a37f80 Build: Update release tool (Nicholas C. Zakas)
9bbcad8 Update: Upgrade Acorn to support ES2017 (fixes #287) (#290) (Jamund Ferguson)
8d9767d Build: Add CI release scripts (Nicholas C. Zakas)

v3.1.7 - July 29, 2016

8f6cfbd Build: Add CI release (Nicholas C. Zakas)
ff15922 Fix: Catch ES2016 invalid syntax (fixes #284) (#285) (Nicholas C. Zakas)

v3.1.6 - June 15, 2016

a90edc2 Upgrade: acorn 3.2.0 (fixes #279) (#280) (Toru Nagashima)

v3.1.5 - May 27, 2016

7df2e4a Fix: Convert ~ and ! prefix tokens to esprima (fixes #274) (#276) (Daniel Tschinder)

v3.1.4 - April 21, 2016

e044705 Fix: remove extra leading comments at node level (fixes #264) (Kai Cataldo)
25c27fb Chore: Remove jQuery copyright from header of each file (Kai Cataldo)
10709f0 Chore: Add jQuery Foundation copyright (Nicholas C. Zakas)
d754b32 Upgrade: Acorn 3.1.0 (fixes #270) (Toru Nagashima)
3a90886 Docs: replace a dead link with the correct contributing guide URL (Shinnosuke Watanabe)
55184a2 Build: replace optimist with a simple native method (Shinnosuke Watanabe)
c7e5a13 Fix: Disallow namespaces objects in JSX (fixes #261) (Kai Cataldo)
22290b9 Fix: Add test for leading comments (fixes #136) (Kai Cataldo)

v3.1.3 - March 18, 2016

98441cb Fix: Fix behavior of ignoring comments within previous nodes (refs #256) (Kai Cataldo)

v3.1.2 - March 14, 2016

a2b23ca Fix: Ensure 'var let' works (fixes #149) (Nicholas C. Zakas)
5783282 Fix: Make obj.await work in modules (fixes #258) (Nicholas C. Zakas)
d1b4929 Fix: leading comments added from previous node (fixes #256) (Kai Cataldo)

v3.1.1 - February 26, 2016

3614e81 Fix: exponentiation operator token (fixes #254) (Nicholas C. Zakas)

v3.1.0 - February 25, 2016

da35d98 New: Support ecmaVersion 7 (fixes #246) (Nicholas C. Zakas)

v3.0.2 - February 19, 2016

0973cda Build: Update release script (Nicholas C. Zakas)
106000f Fix: use the plugins feature of acorn (fixes #250) (Toru Nagashima)
36d84c7 Build: Add tests (fixes #243) (Nicholas C. Zakas)

v3.0.1 - February 2, 2016

ecfe4c8 Upgrade: eslint-config-eslint to 3.0.0 (Nicholas C. Zakas)
ea6261e Fix: Object rest/spread in assign (fixes #247) (Nicholas C. Zakas)
7e57ee0 Docs: fix options.comment typo (xuezu)
dd5863e Build: Add prerelease script (Nicholas C. Zakas)
0b409ee Upgrade: eslint-release to 0.2.0 (Nicholas C. Zakas)

v3.0.0 - January 20, 2016

5ff65f6 Upgrade: Change Esprima version to latest (Nicholas C. Zakas)
a8badcc Upgrade: eslint-release to 0.1.4 (Nicholas C. Zakas)
34d195b Build: Switch to eslint-release (Nicholas C. Zakas)
a0ddc30 Breaking: Remove binary scripts (Nicholas C. Zakas)
02b5284 Build: Fix package.json dependencies (Nicholas C. Zakas)
b07696f Fix: tests for importing keywords (fixes #225) (Toru Nagashima)
2e2808a Build: Add node@5 to CI (fixes #237) (alberto)
445c685 Update: Unrecognized license format in package.json (fixes #234) (alberto)
61cb5ee Update: Remove duplicated acorn-jsx dep (fixes #232) (alberto)
df5b71c Upgrade: eslint and eslint-config-eslint (fixes #231) (alberto)
ef7a06d Fix: lastToken not reset between calls to parse (fixes #229) (alberto)
cdf8407 New: ecmaFeatures.impliedStrict (fixes: #227) (Nick Evans)

v3.0.0-alpha-2 - December 9, 2015

3.0.0-alpha-2 (Nicholas C. Zakas)
Breaking: move ecmaFeatures into ecmaVersion (fixes #222) (Nicholas C. Zakas)
New: Export VisitorKeys (fixes #220) (Nicholas C. Zakas)

v3.0.0-alpha-1 - December 1, 2015

3.0.0-alpha-1 (Nicholas C. Zakas)
Fix: parse unicode escapes in identifiers (fixes #181) (Nicholas C. Zakas)
Fix: Ensur object rest works in destructed arg (fixes #213) (Nicholas C. Zakas)
Breaking: Switch to Acorn (fixes #200) (Nicholas C. Zakas)
Update: Add tokens to tests (fixes #203) (Nicholas C. Zakas)
Docs: Update README (Nicholas C. Zakas)

v2.2.5 - September 15, 2015

2.2.5 (Nicholas C. Zakas)
Fix: Ensure node type is correct for destructured (fixes #195) (Nicholas C. Zakas)

v2.2.4 - August 13, 2015

2.2.4 (Nicholas C. Zakas)
Fix: newlines in arrow functions (fixes #172) (Jamund Ferguson)
Fix: nested arrow function as default param (fixes #145) (Jamund Ferguson)
Fix: Rest Params & Arrow Functions (fixes #187) (Jamund Ferguson)
Fix: trailing commas in import/export (fixes #148) (Jamund Ferguson)
Build: Added sudo false to Travis to build faster (fixes #177) (KahWee Teng)

v2.2.3 - July 22, 2015

2.2.3 (Nicholas C. Zakas)
Fix: Incorrect error location (fixes #173) (Nicholas C. Zakas)

v2.2.2 - July 16, 2015

2.2.2 (Nicholas C. Zakas)
2.2.1 (Nicholas C. Zakas)
Fix: Yield as identifier in arrow func args (fixes #165) (Nicholas C. Zakas)
Fix: Allow AssignmentExpression in object spread (fixes #167) (Nicholas C. Zakas)

v2.2.1 - July 16, 2015

2.2.1 (Nicholas C. Zakas)

v2.2.0 - July 15, 2015

2.2.0 (Nicholas C. Zakas)
New: Add experimental object rest/spread (fixes #163) (Nicholas C. Zakas)
Fix: npm browserify (fixes #156) (Jason Laster)

v2.1.0 - July 10, 2015

2.1.0 (Nicholas C. Zakas)
Fix: Leading comments for anonymous classes (fixes #155, fixes #158) (Toru Nagashima)
New: Add newTarget option (fixes #157) (Nicholas C. Zakas)

v2.0.4 - June 26, 2015

2.0.4 (Nicholas C. Zakas)
Docs: added missing ecmaFeatures.superInFunctions option from doc (Clément Fiorio)
Fix: "await" is a future reserved word (fixes #151) (Jose Roberto Vidal)

v2.0.3 - June 2, 2015

2.0.3 (Nicholas C. Zakas)
Fix: Incomplete Switch Statement Hangs (Fixes #146) (Jamund Ferguson)
Docs: Clarify ecmaFeatures usage (Dan Wolff)

v2.0.2 - April 28, 2015

2.0.2 (Nicholas C. Zakas)
Fix: Allow yield without value as function param (fixes #134) (Nicholas C. Zakas)
Fix: Allow computed generators in classes (fixes #123) (Nicholas C. Zakas)
Fix: Don't allow arrow function rest param (fixes #130) (Nicholas C. Zakas)

v2.0.1 - April 11, 2015

2.0.1 (Nicholas C. Zakas)
Fix: Yield should parse without an argument (fixes #121) (Nicholas C. Zakas)

v2.0.0 - April 4, 2015

2.0.0 (Nicholas C. Zakas)
Docs: Update README with latest info (Nicholas C. Zakas)
Breaking: Use ESTree format for default params (fixes #114) (Nicholas C. Zakas)
New: Add Super node (fixes #115) (Nicholas C. Zakas)
Breaking: Switch to RestElement for rest args (fixes #84) (Nicholas C. Zakas)
Docs: Correct license info on README (fixes #117) (AJ Ortega)
Breaking: Remove guardedHandlers/handlers from try (fixes #71) (Nicholas C. Zakas)

v1.12.3 - March 28, 2015

1.12.3 (Nicholas C. Zakas)
Fix: Tagged template strings (fixes #110) (Nicholas C. Zakas)

v1.12.2 - March 21, 2015

1.12.2 (Nicholas C. Zakas)
Fix: Destructured arg for catch (fixes #105) (Nicholas C. Zakas)

v1.12.1 - March 21, 2015

1.12.1 (Nicholas C. Zakas)
Fix: Disallow octals in template strings (fixes #96) (Nicholas C. Zakas)
Fix: Template string parsing (fixes #95) (Nicholas C. Zakas)
Fix: shorthand properties named get or set (fixes #100) (Brandon Mills)
Fix: bad error in parsing invalid class setter (fixes #98) (Marsup)

v1.12.0 - March 14, 2015

1.12.0 (Nicholas C. Zakas)
Fix: Update broken tests (Nicholas C. Zakas)
New: Add sourceType to Program node (fixes #93) (Nicholas C. Zakas)
Allow spread in more places (fixes #89) (Nicholas C. Zakas)
Fix: Deeply nested template literals (fixes #86) (Nicholas C. Zakas)
Fix: Allow super in classes by default (fixes #87) (Nicholas C. Zakas)
Fix: generator methods in classes (fixes #85) (Jamund Ferguson)
Remove XJS note from Esprima-FB incompatibilities (Joe Lencioni)

v1.11.0 - March 7, 2015

1.11.0 (Nicholas C. Zakas)
Fix: Don't allow default export class by mistake (fixes #82) (Nicholas C. Zakas)
Fix: Export default function should be FunctionDeclaration (fixes #81) (Nicholas C. Zakas)
Fix: Ensure class declarations must have IDs outside of exports (refs #72) (Nicholas C. Zakas)
Fix: export class expression support (refs #72) (Jamund Ferguson)
Update: Add tests for sourceType=module (refs #72) (Nicholas C. Zakas)
Fix: Class name should be id (fixes #78) (Nicholas C. Zakas)
Fix: disallow import/export in functions (refs #72) (Jamund Ferguson)
Test: strict mode enforced in modules (refs #72) (Jamund Ferguson)
New: Add modules feature flag (refs #72) (Nicholas C. Zakas)
merging upstream and solving conflicts for PR #43 (Caridy Patino)
New: Add ES6 module support (fixes #35) (Caridy Patino)
Update: Add TryStatement.handler (fixes #69) (Brandon Mills)
Fix: Destructured Defaults (fixes #56) (Jamund Ferguson)
Update: Refactor out comment attachment logic (Nicholas C. Zakas)

v1.10.0 - March 1, 2015

1.10.0 (Nicholas C. Zakas)
New: Support ES6 classes (refs #10) (Nicholas C. Zakas)
Docs: Update README.md (Jamund Ferguson)

v1.9.1 - February 21, 2015

1.9.1 (Nicholas C. Zakas)
Fix: Allow let/const in switchcase (fixes #54) (Nicholas C. Zakas)

v1.9.0 - February 21, 2015

1.9.0 (Nicholas C. Zakas)
Fix: Extend property method range and loc to include params (fixes #36) (Brandon Mills)
New: spread operator (refs #10) (Jamund Ferguson)
Fix: incorrectly parsed arrow fragment (refs #58) (Jamund Ferguson)
New: Rest Parameter (refs: #10) (Jamund Ferguson)
New: Destructuring (refs #10) (Jamund Ferguson)

v1.8.1 - February 7, 2015

1.8.1 (Nicholas C. Zakas)
Build: Add Node.js 0.12 testing (Nicholas C. Zakas)
Fix: Actuall fix tokenization issue with templates (fixes #44) (Nicholas C. Zakas)

v1.8.0 - February 6, 2015

1.8.0 (Nicholas C. Zakas)
New: Support for Arrow Functions (refs #10) (Jamund Ferguson)
New: Allow super references in functions (refs #10) (Nicholas C. Zakas)
Update create-test.js (Jamund Ferguson)
Fix: Tokenization for template strings (fixes #44) (Nicholas C. Zakas)
New: Allow return in global scope (fixes #46) (Nicholas C. Zakas)

v1.7.1 - January 23, 2015

1.7.1 (Nicholas C. Zakas)
Fix: When ecmaFeatures.forOf is true, check for operater is "undefined" when match keyword is "in" (fixes #39) (Peter Chanthamynavong)

v1.7.0 - January 23, 2015

1.7.0 (Nicholas C. Zakas)
New: Add support for template strings (FredKSchott)
New: Add support for default parameters (refs #10) (Jamund Ferguson)
New: Add support for unicode code point escape sequences (FredKSchott)

v1.6.0 - January 10, 2015

1.6.0 (Nicholas C. Zakas)
Update: Make comment attachment tests look at whole AST (Nicholas C. Zakas)
Docs: Update README to reflect feature flags (Nicholas C. Zakas)
Docs: Add a couple more FAQs to README (Nicholas C. Zakas)
New: Add support for duplicate object literal properties (FredKSchott)
New: Implement generators (refs #10) (Nicholas C. Zakas)

v1.5.0 - December 29, 2014

1.5.0 (Nicholas C. Zakas)
Docs: Update README with compat info (Nicholas C. Zakas)
Update: Add regex parsing test (Nicholas C. Zakas)
Update: s/XJS/JSX/g (Nicholas C. Zakas)
Build: Update release script (Nicholas C. Zakas)
Update: Move SyntaxTree to ast-node-factory.js (FredKSchott)
New: Add JSX parsing (fixes #26) (Nicholas C. Zakas)
Update: Switch location marker logic (fixes #15) (Nicholas C. Zakas)
1.4.0 (Nicholas C. Zakas)

v1.4.0 - December 23, 2014

1.4.0 (Nicholas C. Zakas)
Fix: Parsing issues with property methods (fixes #21) (Nicholas C. Zakas)
New: Add support for shorthand properties (refs #10) (Nicholas C. Zakas)
New: Add support for object literal method shorthand (refs #10) (Nicholas C. Zakas)
Fix: Ensure comments are attached for return (fixes #2) (Nicholas C. Zakas)
Build: Ensure CHANGELOG.md is committed on release (Nicholas C. Zakas)
1.3.1 (Nicholas C. Zakas)

v1.3.1 - December 22, 2014

1.3.1 (Nicholas C. Zakas)
Fix: Add all files to npm package (fixes #17) (Nicholas C. Zakas)
Update: Move Messages to separate file (Nicholas C. Zakas)
Docs: Removed unnecessary comment (Nicholas C. Zakas)
1.3.0 (Nicholas C. Zakas)

v1.3.0 - December 21, 2014

1.3.0 (Nicholas C. Zakas)
Build: Add release scripts (Nicholas C. Zakas)
New: Add computed object literal properties (refs #10) (Nicholas C. Zakas)
Build: Fix commands in Makefile.js (Nicholas C. Zakas)
Docs: Add FAQ to README (Nicholas C. Zakas)
Fix: Don't allow let/const in for loops (fixes #14) (Nicholas C. Zakas)
New: Support for-of loops (refs #10) (Nicholas C. Zakas)
Update: Change .ast.js files to .result.js files (Nicholas C. Zakas)
New: Support ES6 octal literals (Nicholas C. Zakas)
New: Ability to parse binary literals (Nicholas C. Zakas)
Update: More tests for regex u flag (Nicholas C. Zakas)
Update: Switch to using ecmaFeatures (Nicholas C. Zakas)
Update: Add comment attachment tests (Nicholas C. Zakas)
Update README.md (Jamund Ferguson)
New: Add u and y regex flags (refs #10) (Nicholas C. Zakas)
Update: Cleanup tests (Nicholas C. Zakas)
New: Add ecmascript flag (fixes #7) (Nicholas C. Zakas)
Docs: Update README with build commands (Nicholas C. Zakas)
Update: Move some things around (Nicholas C. Zakas)
Update: Read version number from package.json (Nicholas C. Zakas)
Update: Move AST node types to separate file (Nicholas C. Zakas)
Update: Remove duplicate file (Nicholas C. Zakas)
Update: Move token information to a separate file (Nicholas C. Zakas)
Update: Bring in Makefile.js for linting and browserify (Nicholas C. Zakas)
Update: Fix ESLint warnings, remove check-version (Nicholas C. Zakas)
Update: Move Position and SourceLocation to separate file (Nicholas C. Zakas)
Update: Move syntax checks into separate file (Nicholas C. Zakas)
Update: Remove UMD format (Nicholas C. Zakas)
Docs: Update README with more info (Nicholas C. Zakas)
Update: remove npm-debug.log from tracked files (Brandon Mills)
Docs: Remove redundant 'features' in readme (Matthias Oßwald)
Docs: Fix a link to Wikipedia (Ryuichi Okumura)
Update: Split parsing tests into smaller files (Nicholas C. Zakas)
Update: Normalize values in tests (Nicholas C. Zakas)
Update: CommonJSify test file (Nicholas C. Zakas)

Open source →

9.5.128 Mar 2023

`37f6b17` fix: remove useless sourcemap url (fixes #566) (#567) (余腾靖)

Bug Fixes

37f6b17 fix: remove useless sourcemap url (fixes #566) (#567) (余腾靖)

Chores

91d48e9 chore: upgrade eslint-visitor-keys@3.4.0 (#568) (Milos Djermanovic)
5c85ea8 chore: Add lint-staged (#565) (coderaiser)

Open source →

9.5.010 Mar 2023

`4368788` feat: Add parser name (#562) (Nicholas C. Zakas)

Features

4368788 feat: Add parser name (#562) (Nicholas C. Zakas)

Chores

fe89a66 ci: use LTS node version in lint job (#561) (Nitin Kumar)
5a70a0b chore: Add triage action (#560) (Nicholas C. Zakas)

Open source →

9.4.16 Nov 2022

`30f5f2f` docs: update README for ECMAScript 2023 (#557) (Sosuke Suzuki)

Documentation

30f5f2f docs: update README for ECMAScript 2023 (#557) (Sosuke Suzuki)

Chores

ecb6cde ci: add node v19 (#558) (Koichi ITO)

Open source →

9.4.026 Aug 2022

`411d697` feat: Support ES2023 and hashbangs (#556) (Brandon Mills)

Features

411d697 feat: Support ES2023 and hashbangs (#556) (Brandon Mills)

Open source →

9.3.331 Jul 2022

`b1eac6d` fix: don't recognize directives in ES3, allow parenthesized rest target (#554) (Milos Djermanovic)

Bug Fixes

b1eac6d fix: don't recognize directives in ES3, allow parenthesized rest target (#554) (Milos Djermanovic)

Chores

bd3b5c6 ci: update github actions (#552) (Amaresh S M)
45fec88 chore: update package.json (#550) (Deepshika S)

Open source →

9.3.26 May 2022

`6c718af` fix: "use strict" should not trigger strict mode in es3. (#547) (唯然)

Bug Fixes

6c718af fix: "use strict" should not trigger strict mode in es3. (#547) (唯然)

Documentation

c915190 docs: update Build Status badge (#536) (Milos Djermanovic)

Build Related

75f65eb build: add node v18 (#546) (唯然)

Chores

e5982ef chore: lint tool files, add editorconfig, update devDeps. (#545) (Brett Zamir)
b578a66 chore: remove unused devDependencies (#540) (Nitin Kumar)
770b577 chore: add LICENSE file for tests (#539) (Nitin Kumar)

Open source →

9.3.111 Feb 2022

`64010de` fix: Derive espree.Syntax from espree.VisitorKeys (#532) (Frank Weigel)

Bug Fixes

64010de fix: Derive espree.Syntax from espree.VisitorKeys (#532) (Frank Weigel)

Chores

37f2184 chore: Upgrade to eslint-visitor-keys@3.3.0 (#535) (Milos Djermanovic)
ea0cf6a chore: switch from nyc to c8 for ESM coverage (#534) (Brett Zamir)
9fbe22a chore: upgrade eslint-visitor-keys@3.2.0 (#533) (Milos Djermanovic)

Open source →

9.3.031 Dec 2021

`8655f3d` feat: support arbitrary module namespace names (#528) (Milos Djermanovic)

Features

8655f3d feat: support arbitrary module namespace names (#528) (Milos Djermanovic)

Chores

1b72d7a ci: use node v16 for macOS and windows jobs (#527) (Nitin Kumar)

Open source →

9.2.04 Dec 2021

`e807c20` feat: add allowReserved for ES3 (#522) (Jordan Harband)

Features

e807c20 feat: add allowReserved for ES3 (#522) (Jordan Harband)

Documentation

34b9a6a docs: add private-in syntax (#523) (Milos Djermanovic)

Chores

1c4a04d ci: use node v16 (#524) (Nitin Kumar)

Open source →

9.1.021 Nov 2021

`27713ac` feat: Add sourceType:commonjs support (#520) (Nicholas C. Zakas)

Features

27713ac feat: Add sourceType:commonjs support (#520) (Nicholas C. Zakas)
6839389 feat: support for private-in syntax (#521) (Yosuke Ota)
fe07aae feat: support class static blocks (#518) (Milos Djermanovic)

Build Related

c0a8aa2 build: upgrade eslint-release to v3.2.0 to support conventional commits (#517) (Milos Djermanovic)
6be7bcb Build: add node v17 (#516) (唯然)

Chores

93b24dd Chore: add class static blocks tests (#515) (薛定谔的猫)

Open source →

Additional notes

9.1.0 (2026-01-18)

Features

add types to ESLint Scope (#709) (98caac0)

Dependencies

The following workspace dependencies were updated
- devDependencies
  - espree bumped from ^11.0.0 to ^11.1.0

Open source →

9.0.010 Sept 2021

`7952c6f` Breaking: Disallow reserved words in ES3 (#513) (Nicholas C. Zakas)

7952c6f Breaking: Disallow reserved words in ES3 (#513) (Nicholas C. Zakas)
ee1d3ec Fix: 0x2028 and 0x2029 in string literals should increment line number (#514) (Milos Djermanovic)
63bd0bc Chore: use actions/setup-node@v2 (#510) (薛定谔的猫)
bf57077 Chore: Remove obsolete lib/visitor-keys.js (#509) (Matthias Oßwald)

Open source →

Additional notes

9.0.0 (2025-11-07)

⚠ BREAKING CHANGES

Resolve references to global var/function, add addGlobals() (#682)
Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#696)

Features

Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#696) (9c84ecb)
Resolve references to global var/function, add addGlobals() (#682) (f007b46)

Dependencies

The following workspace dependencies were updated
- devDependencies
  - eslint-visitor-keys bumped from ^4.2.1 to ^5.0.0
  - espree bumped from ^10.4.0 to ^11.0.0

Open source →

8.0.030 Jun 2021

`c335413` Upgrade: eslint-visitor-keys@3.0.0 (#507) (Milos Djermanovic)

c335413 Upgrade: eslint-visitor-keys@3.0.0 (#507) (Milos Djermanovic)
e08c9d7 8.0.0-beta.1 (ESLint Jenkins)
c8976d6 Build: changelog update for 8.0.0-beta.1 (ESLint Jenkins)
e207bd7 Update: Support top-level await and regexp match indices (#505) (Nicholas C. Zakas)
9eff2c7 Update: reset default ecmaVersion to 5 (#506) (Nicholas C. Zakas)
c8ca49a 8.0.0-beta.0 (ESLint Jenkins)
997956b Build: changelog update for 8.0.0-beta.0 (ESLint Jenkins)
d017d38 Breaking: drop node v10/13/v15 (fixes #501) (#502) (薛定谔的猫)
e71162c Update: add class fields (refs eslint/eslint#14343) (#486) (Toru Nagashima)
b068cea Breaking: Implement 'ecmaVersion: latest' (fixes #495) (#499) (Nicholas C. Zakas)
8294427 Upgrade: eslint-release@3.1.2 (#494) (Milos Djermanovic)
4c1f17d Chore: Refactor TemplateElement range fix (#489) (fisker Cheung)
6ffd604 Chore: Improve readability of Program position fix part (#493) (fisker Cheung)
94508b7 Upgrade: acorn to 8.2.2 (fixes #472) (#492) (薛定谔的猫)
864a73e Chore: fix incorrect comment (#491) (薛定谔的猫)
34e1ab9 Chore: Add tests and comments (refs #349) (#487) (Nicholas C. Zakas)
dffb7aa Breaking: syncing start/end with range (fixes #349) (#461) (Anix)
e86f386 Chore: remove --legacy-peer-deps for Node 15 (#485) (Milos Djermanovic)
ecaf510 Build: add node v16 (#481) (薛定谔的猫)
b8d35ed Chore: rm devdep leche (fixes #480) (#482) (薛定谔的猫)
651e204 Chore: Fix/remove tools (fixes #471) (#476) (Nicholas C. Zakas)
671c3aa Docs: Update README with ESM instructions (fixes #474) (#477) (Nicholas C. Zakas)
8209e4e Build: Update scripts for release (fixes #475) (#478) (Nicholas C. Zakas)
5dd3dee Build: Update branch reference in CI (#479) (Nicholas C. Zakas)
995d2a8 Breaking: acorn to 8.1.0 (fixes #470) (#473) (薛定谔的猫)
8234c48 Breaking: provide ESM export (refs eslint/rfcs#72) (#469) (Mike Reinstein)
2080ce6 Chore: Test on Node 15.x (#468) (Milos Djermanovic)
fc384a4 Upgrade: eslint devDependencies (#467) (Milos Djermanovic)
1a8ec00 Build: remove browserify script (#466) (Milos Djermanovic)
3b4ca9e Chore: Add test for valid non-string input (#463) (stonegray)
1b99259 Upgrade: eslint-visitor-keys@2.0.0 (#462) (Milos Djermanovic)

Open source →

8.0.0-beta.124 Jun 2021pre-release

`e207bd7` Update: Support top-level await and regexp match indices (#505) (Nicholas C. Zakas)

e207bd7 Update: Support top-level await and regexp match indices (#505) (Nicholas C. Zakas)
9eff2c7 Update: reset default ecmaVersion to 5 (#506) (Nicholas C. Zakas)

Open source →

8.0.0-beta.011 Jun 2021pre-release

`d017d38` Breaking: drop node v10/13/v15 (fixes #501) (#502) (薛定谔的猫)

d017d38 Breaking: drop node v10/13/v15 (fixes #501) (#502) (薛定谔的猫)
e71162c Update: add class fields (refs eslint/eslint#14343) (#486) (Toru Nagashima)
b068cea Breaking: Implement 'ecmaVersion: latest' (fixes #495) (#499) (Nicholas C. Zakas)
8294427 Upgrade: eslint-release@3.1.2 (#494) (Milos Djermanovic)
4c1f17d Chore: Refactor TemplateElement range fix (#489) (fisker Cheung)
6ffd604 Chore: Improve readability of Program position fix part (#493) (fisker Cheung)
94508b7 Upgrade: acorn to 8.2.2 (fixes #472) (#492) (薛定谔的猫)
864a73e Chore: fix incorrect comment (#491) (薛定谔的猫)
34e1ab9 Chore: Add tests and comments (refs #349) (#487) (Nicholas C. Zakas)
dffb7aa Breaking: syncing start/end with range (fixes #349) (#461) (Anix)
e86f386 Chore: remove --legacy-peer-deps for Node 15 (#485) (Milos Djermanovic)
ecaf510 Build: add node v16 (#481) (薛定谔的猫)
b8d35ed Chore: rm devdep leche (fixes #480) (#482) (薛定谔的猫)
651e204 Chore: Fix/remove tools (fixes #471) (#476) (Nicholas C. Zakas)
671c3aa Docs: Update README with ESM instructions (fixes #474) (#477) (Nicholas C. Zakas)
8209e4e Build: Update scripts for release (fixes #475) (#478) (Nicholas C. Zakas)
5dd3dee Build: Update branch reference in CI (#479) (Nicholas C. Zakas)
995d2a8 Breaking: acorn to 8.1.0 (fixes #470) (#473) (薛定谔的猫)
8234c48 Breaking: provide ESM export (refs eslint/rfcs#72) (#469) (Mike Reinstein)
2080ce6 Chore: Test on Node 15.x (#468) (Milos Djermanovic)
fc384a4 Upgrade: eslint devDependencies (#467) (Milos Djermanovic)
1a8ec00 Build: remove browserify script (#466) (Milos Djermanovic)
3b4ca9e Chore: Add test for valid non-string input (#463) (stonegray)
1b99259 Upgrade: eslint-visitor-keys@2.0.0 (#462) (Milos Djermanovic)

Open source →

7.3.15 Dec 2020

`fef6f4a` Upgrade: acorn-jsx@5.3.1 (#459) (Milos Djermanovic)

fef6f4a Upgrade: acorn-jsx@5.3.1 (#459) (Milos Djermanovic)
0e09d9a Chore: Add tests for ecmaVersion default value (#460) (Milos Djermanovic)
4c70052 Docs: Fix some minor typos in the READMEs (#455) (Noah Doersing)

Open source →

7.3.022 Aug 2020

`4ba3eef` Chore: move to GitHub Actions (#449) (Kai Cataldo)

4ba3eef Chore: move to GitHub Actions (#449) (Kai Cataldo)
bd0a405 Update: support logical assignment and numeric separators (#448) (Toru Nagashima)

Open source →

7.2.018 Jul 2020

`91c2d58` Docs: Add security policy (#447) (Nicholas C. Zakas)

91c2d58 Docs: Add security policy (#447) (Nicholas C. Zakas)
872645c Update: support optional chaining (#446) (Toru Nagashima)
0cc7800 Docs: Clean up LICENSE file (#445) (Nicholas C. Zakas)

Open source →

7.1.04 Jun 2020

`75e80bc` Update: support ?? operator, import.meta, and export * as ns (#441) (Toru Nagashima)

75e80bc Update: support ?? operator, import.meta, and export * as ns (#441) (Toru Nagashima)
ad0543c Chore: added fixlint in Makefile.js (#440) (Anix)

Open source →

7.0.07 May 2020

`8fe2efc` Breaking: drop Node v8 support (#429) (Kai Cataldo)

8fe2efc Breaking: drop Node v8 support (#429) (Kai Cataldo)
6048bfe Docs: documenting public API (fixes #431) (#442) (Anix)
9a4cff3 Chore: added tests for options normalize (#439) (Anix)
99707f3 Chore: added lockfiles to .gitignore (#438) (Anix)
9b91bcc Docs: new site for docs (#436) (Anix)

Open source →

6.2.110 Mar 2020

`d6d7480` Upgrade: acorn 7.1.1, Regex DOS vuln (fixes #435) (#434) (James)

d6d7480 Upgrade: acorn 7.1.1, Regex DOS vuln (fixes #435) (#434) (James)

Open source →

6.2.02 Mar 2020

`ced1b68` Update: update acorn-jsx and fix failing test (#432) (Kai Cataldo)

ced1b68 Update: update acorn-jsx and fix failing test (#432) (Kai Cataldo)
acb8776 Update: add latestEcmaVersion & supportedEcmaVersions (#430) (Kai Cataldo)

Open source →

6.1.221 Oct 2019

`70c4970` Fix: misuse token types (fixes #393, refs eslint/eslint#11018) (#426) (Toru Nagashima)

70c4970 Fix: misuse token types (fixes #393, refs eslint/eslint#11018) (#426) (Toru Nagashima)

Open source →

6.1.124 Aug 2019

`ba81546` Upgrade: dev deps to latest (#424) (薛定谔的猫)

ba81546 Upgrade: dev deps to latest (#424) (薛定谔的猫)
bbe0119 Upgrade: acorn-jsx@5.0.2 (#423) (薛定谔的猫)
c0635ba Docs: update readme to mention ES2020 (#422) (Kai Cataldo)

Open source →

6.1.018 Aug 2019

`9870c55` Update: improve error messaging when validating ecmaVersion (#421) (Kai Cataldo)

9870c55 Update: improve error messaging when validating ecmaVersion (#421) (Kai Cataldo)
3f49224 Fix: tokenize the latest right curly brace (fixes #403) (#419) (finico)
f5e58cc Update: support bigint and dynamic import (#415) (Toru Nagashima)

Open source →

6.0.022 Jun 2019

`a988a36` Build: add node 12 (#414) (薛定谔的猫)

a988a36 Build: add node 12 (#414) (薛定谔的猫)

Open source →

6.0.0-alpha.013 Apr 2019pre-release

`493d464` Breaking: validate parser options (fixes #384) (#412) (薛定谔的猫)

493d464 Breaking: validate parser options (fixes #384) (#412) (薛定谔的猫)

Open source →

5.0.115 Feb 2019

`c40e2fc` Upgrade: acorn@6.0.7 (#407) (Kai Cataldo)

c40e2fc Upgrade: acorn@6.0.7 (#407) (Kai Cataldo)

Open source →

Additional notes

5.0.1 (2026-02-20)

Bug Fixes

improve tree-shaking (#725) (b699f32)

Open source →

5.0.05 Dec 2018

`1bcd563` Breaking: remove attachComment (#405) (Kai Cataldo)

1bcd563 Breaking: remove attachComment (#405) (Kai Cataldo)
35623ee Chore: update linting config (#406) (Kai Cataldo)
4b86a7d Build: add node 11 (#400) (薛定谔的猫)
7c278d6 Fix: build failing due to incorrectly super() call (fixes #398) (#399) (薛定谔的猫)
6ebc219 Upgrade: eslint & eslint-config-eslint (#387) (薛定谔的猫)

Open source →

Additional notes

5.0.0 (2025-11-07)

⚠ BREAKING CHANGES

Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#696)

Features

Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#696) (9c84ecb)

Open source →

4.1.024 Oct 2018

8eadb88 Upgrade: acorn 6, acorn-jsx 5, and istanbul (#391) (Toru Nagashima)

8eadb88 Upgrade: acorn 6, acorn-jsx 5, and istanbul (#391) (Toru Nagashima)
0f2edb8 Upgrade: eslint-release@1.0.0 (#392) (Teddy Katz)
560b6f7 Update: VisitorKeys depend on eslint-visitor-keys (#389) (othree)
6bf2ebf Docs: Fix some typos in the README (#386) (Hugo Locurcio)

Open source →

4.0.021 Jun 2018

Nothing published for this version

4.0.0-rc.09 Jun 2018pre-release

d8224c4 Build: Adding rc release script to package.json (#383) (Kevin Partington)

d8224c4 Build: Adding rc release script to package.json (#383) (Kevin Partington)
4207773 Build: add node 10 (#381) (薛定谔的猫)
cd9da7e Update: upgrade acorn to support two ES2019 syntax (#380) (Toru Nagashima)
8cb3ceb Chore: remove Object.assign polyfill (#382) (薛定谔的猫)

Open source →

4.0.0-alpha.128 May 2018pre-release

56c5a9c Fix: remove workarounds for acorn < 4 (#372) (Rouven Weßling)

56c5a9c Fix: remove workarounds for acorn < 4 (#372) (Rouven Weßling)
fd305e5 Upgrade: eslint-release to v0.11.1 (#376) (Teddy Katz)

Open source →

4.0.0-alpha.030 Mar 2018pre-release

95fa890 Build: fix typos in package.json release scripts (#375) (Teddy Katz)

95fa890 Build: fix typos in package.json release scripts (#375) (Teddy Katz)
6284e09 Breaking: remove experimentalObjectRestSpread option (#374) (Teddy Katz)
0df063f Breaking: require Node.js 6+, upgrade acorn-jsx@4.1.1 (fixes #345) (#371) (薛定谔的猫)
0252144 Upgrade: acorn 5.5.1 (#370) (Rouven Weßling)

Open source →

3.5.44 Mar 2018

706167b Upgrade: acorn 5.5.0 (#369) (Toru Nagashima)

706167b Upgrade: acorn 5.5.0 (#369) (Toru Nagashima)

Open source →

3.5.33 Feb 2018

70f9859 Upgrade: acorn 5.4.0 (#367) (Toru Nagashima)

70f9859 Upgrade: acorn 5.4.0 (#367) (Toru Nagashima)
cea4823 Chore: Adding .gitattributes file (#366) (Kevin Partington)
4160aee Upgrade: acorn v5.3.0 (#365) (Toru Nagashima)

Open source →

3.5.210 Nov 2017

019b70a Fix: Remove blockBindings from docs (fixes #307, fixes #339) (#356) (Jan Pilzer)

019b70a Fix: Remove blockBindings from docs (fixes #307, fixes #339) (#356) (Jan Pilzer)
b2016cb Chore: refactoring rest/spread properties (#361) (Toru Nagashima)
59c9d06 Chore: upgrade acorn@5.2 (fixes #358) (#360) (Toru Nagashima)
06c35c9 Chore: add .npmrc (#359) (Toru Nagashima)

Open source →

3.5.115 Sept 2017

5eb1388 Fix: Fix parsing of async keyword-named object methods (#352) (#353) (Mark Banner)

5eb1388 Fix: Fix parsing of async keyword-named object methods (#352) (#353) (Mark Banner)

Open source →

3.5.05 Aug 2017

4d442a1 Update: add initial support for ES2018 (#348) (Teddy Katz)

4d442a1 Update: add initial support for ES2018 (#348) (Teddy Katz)
d4bdcb6 Fix: Make template token objects adhere to token object structure (#343) (Ian Christian Myers)
9ac671a Upgrade: acorn to 5.1.1 (#347) (Teddy Katz)
16e1fec Docs: Specify default values of options (fixes #325) (#342) (Jan Pilzer)
be85b8e Fix: async shorthand properties (fixes #340) (#341) (Toru Nagashima)

Open source →

3.4.35 May 2017

343590a Fix: add AwaitExpression to espree.Syntax (fixes #331) (#332) (Teddy Katz)

343590a Fix: add AwaitExpression to espree.Syntax (fixes #331) (#332) (Teddy Katz)

Open source →

3.4.221 Apr 2017

c99e436 Upgrade: eslint to 2.13.1 (#328) (Teddy Katz)

c99e436 Upgrade: eslint to 2.13.1 (#328) (Teddy Katz)
628cf3a Fix: don't mutate user-provided configs (fixes #329) (#330) (Teddy Katz)

Open source →

3.4.131 Mar 2017

a3ae0bd Upgrade: acorn to 5.0.1 (#327) (Teddy Katz)

a3ae0bd Upgrade: acorn to 5.0.1 (#327) (Teddy Katz)
15ef24f Docs: Add badges (#326) (Jan Pilzer)
652990a Fix: raise error for trailing commas after rest properties (fixes #310) (#323) (Teddy Katz)
9d86ba5 Upgrade: acorn to ^4.0.11 (#317) (Toru Nagashima)
a3442b5 Chore: fix tests for Node 6+ (#315) (Teddy Katz)

Open source →

3.4.02 Feb 2017

f55fa51 Build: Lock acorn to v4.0.4 (#314) (Kai Cataldo)

f55fa51 Build: Lock acorn to v4.0.4 (#314) (Kai Cataldo)
58f75be Fix:generic error for invalid ecmaVersion(fixes eslint#7405) (#303) (Scott Stern)
d6b383d Docs: Update license copyright (Nicholas C. Zakas)
e5df542 Update: To support year in ecmaVersion number (fixes #300) (#301) (Gyandeep Singh)

Open source →

3.3.229 Sept 2016

7d3e2fc Fix: reset isAsync flag for each property (fixes #298) (#299) (Toru Nagashima)

7d3e2fc Fix: reset isAsync flag for each property (fixes #298) (#299) (Toru Nagashima)

Open source →

3.3.126 Sept 2016

80abdce Fix: } token followed by template had been lost (fixes #293) (#294) (Toru Nagashima)

80abdce Fix: } token followed by template had been lost (fixes #293) (#294) (Toru Nagashima)
9810bab Fix: parsing error on async as property name. (#295) (Toru Nagashima)

Open source →

3.3.020 Sept 2016

92b04b1 Update: create-test script (fixes #291) (#292) (Jamund Ferguson)

92b04b1 Update: create-test script (fixes #291) (#292) (Jamund Ferguson)

Open source →

3.2.016 Sept 2016

5a37f80 Build: Update release tool (Nicholas C. Zakas)

5a37f80 Build: Update release tool (Nicholas C. Zakas)
9bbcad8 Update: Upgrade Acorn to support ES2017 (fixes #287) (#290) (Jamund Ferguson)
8d9767d Build: Add CI release scripts (Nicholas C. Zakas)

Open source →

3.1.729 Jul 2016

8f6cfbd Build: Add CI release (Nicholas C. Zakas)

8f6cfbd Build: Add CI release (Nicholas C. Zakas)
ff15922 Fix: Catch ES2016 invalid syntax (fixes #284) (#285) (Nicholas C. Zakas)

Open source →

Your coding agent can read these notes before it upgrades. Set up the MCP server →

espree

Release timeline

Releases

11.2.0 (2026-03-04)

Features

11.1.1 (2026-02-20)

Bug Fixes

Dependencies

From the same repository

11.1.0 (2026-01-18)

Features

Bug Fixes

11.0.0 (2025-11-07)

⚠ BREAKING CHANGES

Features

Dependencies

10.4.0 (2025-06-09)

Features

Dependencies

10.3.0 (2024-10-29)

Features

Dependencies

10.2.0 (2024-09-27)

Features

Bug Fixes

Dependencies

10.1.0 (2024-06-17)

Features

10.0.1 (2024-02-09)

Chores

Chores

10.0.0 (2024-01-25)

⚠ BREAKING CHANGES

Features

Bug Fixes

Chores

9.6.1 (2023-07-14)

Chores

9.6.0 (2023-06-19)

Features

9.5.2 (2023-05-05)

Chores

Chores

Bug Fixes

Chores

Features

Chores

Documentation

Chores

Features

Bug Fixes

Chores

Bug Fixes

Documentation

Build Related

Chores

Bug Fixes

Chores

Features

Chores

Features

Documentation

Chores

Features

Build Related

Chores

9.1.0 (2026-01-18)

Features

Dependencies

9.0.0 (2025-11-07)

⚠ BREAKING CHANGES

Features

Dependencies

5.0.1 (2026-02-20)

Bug Fixes

5.0.0 (2025-11-07)

⚠ BREAKING CHANGES

Features