jashkenas/underscore

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JavaScript's utility _ belt

Stars: 27.3k
Forks: 5.4k
Open beginner issues: 0
Indexed issues: 31
Avg merge: 2d 5h
Merged PRs (30d): 1

Dominant language: JavaScript
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 18, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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31 open issues indexed

Failing _.delay test in webkit Open

question test

Difficulty 3/5 1-2 days Newbie friendliness 48/100

jashkenas/underscore#3025 · Opened Sep 15, 2026
Please let me know if you would like to review pull requests Open

question starter

Difficulty 1/5 Under an hour Newbie friendliness 20/100

jashkenas/underscore#3014 · 10 comments · 3 reactions · Opened Feb 25, 2026
Are there any plans for the next version release? Open

question

Difficulty 5/5 Over a week Newbie friendliness 15/100

jashkenas/underscore#2994 · 4 comments · Opened Apr 4, 2024
Possibility to update a nested object's property in a non-mutable way Open

enhancement starter

Difficulty 4/5 3-5 days Newbie friendliness 48/100

jashkenas/underscore#2948 · 4 comments · Opened Feb 28, 2022
Utility functions for prototype-based programming Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

jashkenas/underscore#2947 · 1 comment · Opened Dec 21, 2021
Compare errors by identity in _.isEqual Open

breaking change starter

Difficulty 3/5 1-2 days Newbie friendliness 35/100

jashkenas/underscore#2882 · 14 comments · Opened Oct 8, 2020
add _.oneArg (and maybe _.twoArgs and _.limitArgs) Open

contrib enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

jashkenas/underscore#2871 · 2 comments · Opened Aug 7, 2020
Double chaining leads to a stack overflow Open

starter

Difficulty 3/5 1-2 days Newbie friendliness 42/100

jashkenas/underscore#2853 · Opened Jun 2, 2020
Add _.toggle/_.transition/_.fsm to underscore Open

contrib enhancement question

Difficulty 5/5 Over a week Newbie friendliness 20/100

jashkenas/underscore#2850 · 5 comments · Opened May 10, 2020
Shorthand for piping a value through a bunch of functions Open

breaking change question

Difficulty 3/5 1-2 days Newbie friendliness 55/100

jashkenas/underscore#2809 · 12 comments · Opened May 30, 2019
_.max and _.min may behave incorrectly if iteratee returns infinite number Open

bug fixed

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

jashkenas/underscore#2688 · 3 comments · Opened Jul 9, 2017
New function findKeys proposition Open

contrib enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

jashkenas/underscore#2676 · 10 comments · Opened Jun 6, 2017
_.eq Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 38/100

jashkenas/underscore#2456 · 4 comments · 1 reaction · Opened Mar 1, 2016
isSafeInteger Open

contrib

Difficulty 5/5 Over a week Newbie friendliness 30/100

jashkenas/underscore#2455 · 3 comments · Opened Mar 1, 2016
Change to SameValueZero for comparisons Open

breaking change

Difficulty 4/5 3-5 days Newbie friendliness 35/100

jashkenas/underscore#2453 · 1 comment · 1 reaction · Opened Feb 29, 2016
iterator support for _.toArray Open

breaking change

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

jashkenas/underscore#2448 · 5 comments · Opened Feb 27, 2016
Make the underscore wrapper iterable Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

jashkenas/underscore#2447 · 1 comment · 2 reactions · Opened Feb 27, 2016
_.bind supports _.partial application, but not its non pre-filled argument syntax with _ Open

breaking change documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

jashkenas/underscore#2328 · 5 comments · Opened Oct 26, 2015
Drop support for IE < 11 Open

breaking change

Difficulty 5/5 Over a week Newbie friendliness 25/100

jashkenas/underscore#2325 · 7 comments · Opened Oct 21, 2015
_.union doesn't work with arrays of objects Open

breaking change

Difficulty 5/5 Over a week Newbie friendliness 30/100

jashkenas/underscore#2311 · 32 comments · Opened Oct 2, 2015
_.size to return symbol count of strings. Open

breaking change

Difficulty 4/5 3-5 days Newbie friendliness 35/100

jashkenas/underscore#2302 · 4 comments · Opened Sep 16, 2015
Underscore could use a _.propertyResult Open

contrib enhancement

Difficulty 3/5 1-2 days Newbie friendliness 42/100

jashkenas/underscore#2286 · 3 comments · Opened Aug 25, 2015
executeBound on var arg constructors Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

jashkenas/underscore#2214 · 9 comments · Opened Jun 12, 2015
Supporting ES6 iterables in collection methods Open

breaking change enhancement question

Difficulty 5/5 Over a week Newbie friendliness 25/100

jashkenas/underscore#2147 · 3 comments · 11 reactions · Opened Apr 10, 2015
Go on a Diet Open

breaking change

Difficulty 4/5 3-5 days Newbie friendliness 35/100

jashkenas/underscore#2060 · 8 comments · Opened Feb 19, 2015
Experiment with sourceURLs for better Underscore Template Debugging Open

enhancement starter

Difficulty 5/5 Over a week Newbie friendliness 20/100

jashkenas/underscore#1973 · 3 comments · Opened Dec 10, 2014
_.sortedLastIndex Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

jashkenas/underscore#1882 · 3 comments · Opened Sep 29, 2014
Expand support for methods used as iteratees. Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

jashkenas/underscore#1865 · 3 comments · Opened Sep 22, 2014
Consider switching memoize cache to be compatible with ES6 Map/WeakMap. Open

breaking change

Difficulty 5/5 Over a week Newbie friendliness 30/100

jashkenas/underscore#1862 · 11 comments · 1 reaction · Opened Sep 19, 2014
Feature request: _.deleteWhere Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

jashkenas/underscore#1856 · 16 comments · Opened Sep 18, 2014
Inconsistent results when passing empty jQuery object to _.isEmpty Open

breaking change question

Difficulty 3/5 1-2 days Newbie friendliness 35/100

jashkenas/underscore#1715 · 13 comments · Opened Jul 2, 2014

jashkenas/underscore

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