esprima

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ECMAScript parsing infrastructure for multipurpose analysis

astecmascriptesprimajavascriptparserparsing

BSD 2-Clause "Simplified" License

Created on Nov 23, 2011

Updated on Apr 5, 2026

Stars

7.1k

Forks

774

Watchers

7.1k

Open Issues

149

Repository Health Score

💛

80/100

Good

Overall repository health assessment

Score Breakdown

Activity

Active development - updated this week

30/30

100%

Issues Analytics

61

Total Issues

All time

35

Open

57% of total

26

Closed

Recent Commits

clean up duplicate parameter detection

Marko Lahma•4 years ago

512cd66View on GitHub

Support async generators

Marko Lahma•4 years ago

9b3ad04View on GitHub

Fix missing optional attributes from tree JSON files

Marko Lahma•4 years ago

4e3b259View on GitHub

Support for ES2020 import.meta

Remi Liu•5 years ago

a35ed6bView on GitHub

Nightly publish to npm (#1749)

Ariya Hidayat•4 years ago

145bd1cView on GitHub

use modern nodejs versions (#2086)

Meir Blachman•4 years ago

ad272e0View on GitHub

Update README.md to ES2019

Remi Liu•4 years ago

54af8f0View on GitHub

update unit-tests count

Meir Blachman•4 years ago

55db25dView on GitHub

Support JSX fragment (#2046)

cinchen•5 years ago

24c5620View on GitHub

Move complexity check to ESLint

Remi Liu•5 years ago

977b1f8View on GitHub

Silence most linter warnings, until one day we fix them

Ariya Hidayat•4 years ago

2f5cfd7View on GitHub

Support for ES2019 optional catch binding

Remi Liu•5 years ago

3b68586View on GitHub

Add support for Optional Chaining

Remi Liu•5 years ago

0911ad8View on GitHub

Update README.md

Meir Blachman•5 years ago

70c0159View on GitHub

Support for ES2018 Template Literal Revision (#1587)

Ariya Hidayat•5 years ago

ab6420bView on GitHub

View all commits

Community

7,134 stars, 774 forks

15/30

50%

Documentation

Has description, license

15/20

75%

Maintenance

2.1% issue ratio

20/20

100%

Health score is calculated based on activity, community engagement, documentation quality, and maintenance practices

Languages

TypeScript

70.7%

JavaScript

29.3%

Dependencies19 total

0

Production

19

Development

Development Dependencies (19)

@typescript-eslint/eslint-plugin^2.14.0

@typescript-eslint/parser^2.14.0

codecov.io~0.1.6

eslint^6.8.0

Top Contributors

1

ariya

User

1.0k

commits

2

Constellation

User

42

commits

3

ikarienator

User

26

commits

4

jboekesteijn

User

13

commits

5

mathiasbynens

User

12

commits

6

michaelficarra

User

10

commits

7

jasonLaster

User

9

commits

8

Swatinem

User

8

commits

9

mikesherov

User

7

commits

10

ljqx

User

7

commits

Languages

TypeScript

70.7%

JavaScript

29.3%

Issues Analytics

61

Total Issues

All time

35

Open

57% of total

26

Closed

Dependencies19 total

0

Production

19

Development

Development Dependencies (19)

@typescript-eslint/eslint-plugin^2.14.0

@typescript-eslint/parser^2.14.0

codecov.io~0.1.6

eslint^6.8.0

eslint-plugin-esprima-internalfile:eslint

everything.js~1.0.3

glob~7.1.0

istanbul~0.4.0

json-diff~0.3.1

mocha~3.2.0

node-tick-processor~0.0.2

regenerate~1.3.2

results-interpreter~1.0.0

temp~0.8.3

test262-stream~1.3.0

typescript~3.2.1

typescript-formatter~7.2.2

unicode-12.1.0^0.8.0

webpack~1.14.0

esprimav4.0.0-dev

43% of total

2mo

Avg Close Time

Avg response

Issues Activity: Last 6 months

Top Labels

Hottest Issues

1

#2079 [FeatureRequest] esm release

26

open

2

#2078 Release new Version & open Pulls

13

5

closed

3

#2034 Fails to parse 'Spread' syntax: Unexpected token ...

8

open

4

#2122 Is this project abandoned?

1

14

open

5

#2023 ES2020 Optional Chaining

1

13

closed

Top Contributors

1

ariya

User

1.0k

commits

2

Constellation

User

42

commits

3

ikarienator

User

26

commits

4

jboekesteijn

User

13

commits

5

mathiasbynens

User

12

commits

6

michaelficarra

User

10

commits

7

jasonLaster

User

9

commits

8

Swatinem

User

8

commits

9

mikesherov

User

7

commits

10

ljqx

User

7

commits

Recent Commits

clean up duplicate parameter detection

Marko Lahma•4 years ago

512cd66View on GitHub

Support async generators

Marko Lahma•4 years ago

9b3ad04View on GitHub

Fix missing optional attributes from tree JSON files

Marko Lahma•4 years ago

4e3b259View on GitHub

Support for ES2020 import.meta

Remi Liu•5 years ago

a35ed6bView on GitHub

Nightly publish to npm (#1749)

Ariya Hidayat•4 years ago

145bd1cView on GitHub

use modern nodejs versions (#2086)

Meir Blachman•4 years ago

ad272e0View on GitHub

Update README.md to ES2019

Remi Liu•4 years ago

54af8f0View on GitHub

update unit-tests count

Meir Blachman•4 years ago

55db25dView on GitHub

Support JSX fragment (#2046)

cinchen•5 years ago

24c5620View on GitHub

Move complexity check to ESLint

Remi Liu•5 years ago

977b1f8View on GitHub

Silence most linter warnings, until one day we fix them

Ariya Hidayat•4 years ago

2f5cfd7View on GitHub

Support for ES2019 optional catch binding

Remi Liu•5 years ago

3b68586View on GitHub

Add support for Optional Chaining

Remi Liu•5 years ago

0911ad8View on GitHub

Update README.md

Meir Blachman•5 years ago

70c0159View on GitHub

Support for ES2018 Template Literal Revision (#1587)

Ariya Hidayat•5 years ago

ab6420bView on GitHub

View all commits

GitHub Explorer

esprima

Score Breakdown

Development Dependencies (19)

Development Dependencies (19)

Issues Activity: Last 6 months

Top Labels

Hottest Issues