Owner

ljharb

92 indexed repositories · View on GitHub

qs
A querystring parser and serializer with nesting support

JavaScript · 8941 stars
prop-types-tools
Custom React PropType validators

JavaScript · 663 stars
prop-types-exact
For use with React PropTypes. Will error on any prop not explicitly specified.

JavaScript · 237 stars
util.promisify
Polyfill/shim for util.promisify in node versions < v8

JavaScript · 125 stars
es-abstract
ECMAScript spec abstract operations.

JavaScript · 125 stars
json-stable-stringify

JavaScript · 79 stars
shell-quote

JavaScript · 62 stars
js-traverse

JavaScript · 60 stars
ls-engines
Determine if your dependency graph's stated "engines" criteria is met.

JavaScript · 56 stars
istanbul-merge
Merge multiple istanbul coverage reports into one.

JavaScript · 54 stars
json-file-plus
Read from and write to a JSON file, minimizing diffs and preserving formatting.

JavaScript · 44 stars
get-intrinsic
Get and robustly cache all JS language-level intrinsics at first require time.

JavaScript · 35 stars
npmignore
Command line tool for creating or updating a .npmignore file based on .gitignore.

JavaScript · 29 stars
repo-report
CLI to list all repos a user has access to, and report on their configuration in aggregate.

JavaScript · 25 stars
es-to-primitive
ECMAScript "ToPrimitive" algorithm. Provides ES5 and ES6/ES2015 versions.

JavaScript · 21 stars
define-properties
Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in olde...

JavaScript · 20 stars
eslint-config
My shareable `eslint` config.

JavaScript · 20 stars
global-cache
Sometimes you have to do horrible things, like use the global object to share a singleton. Abstract that away, with this!

JavaScript · 19 stars
can-merge

JavaScript · 14 stars
list-exports
Given a package name and a version number, or a path to a package.json, what specifiers does it expose?

JavaScript · 14 stars
72 more repositories live on View on GitHub

Beginner friendly Everything

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`parse()` does not support bash ANSI-C quoting (`$'...'`) Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

ljharb/shell-quote#32 · Opened Sep 18, 2026
Why shellParse two '<' of 'cat > tmp.txt << a' ? Open

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

ljharb/shell-quote#31 · 1 comment · Opened Sep 13, 2026
[Breaking] `parse`: text between and after balanced bracket groups is silently discarded, collapsing distinct keys onto one path Open

semver-major: breaking change

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

ljharb/qs#619 · 1 comment · Opened Sep 10, 2026
allowDots corrupts a key when a bracket segment contains a literal dot Open

Difficulty 3/5 1-2 days Newbie friendliness 62/100

ljharb/qs#617 · Opened Sep 3, 2026
readme errata: args is read from process.argv Open

Difficulty 1/5 Under an hour Newbie friendliness 95/100

ljharb/pargs#3 · 1 comment · Opened Aug 29, 2026
README note: what the output does not distinguish when used as a hash input Open

Difficulty 1/5 Under an hour Newbie friendliness 85/100

ljharb/json-stable-stringify#24 · Opened Aug 12, 2026
process.execPath is never realpath-resolved, so argv-filtering breaks when node is reached via a symlink/junction (scoop, nvm, fnm, volta) Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

ljharb/pargs#2 · Opened Aug 3, 2026
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

ljharb/es-abstract-get#1 · Opened Jun 15, 2026
Dependency Dashboard Open

Difficulty 2/5 1-3 hours Newbie friendliness 20/100

ljharb/require-stash#1 · Opened Jun 8, 2026
Add metric: "Allow comments on individual commits" Open

enhancement help wanted research

Difficulty 3/5 1-2 days Newbie friendliness 52/100

ljharb/repo-report#114 · Opened Apr 23, 2026
Add metric: commit comments enabled/disabled Open

enhancement help wanted missing in API

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

ljharb/repo-report#113 · Opened Mar 27, 2026
.claude/settings.local.json` shipped in published npm package Open

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

ljharb/es-abstract#162 · Opened Mar 23, 2026
[Breaking] flip `strictMerge` default to `false` in v7 Open

semver-major: breaking change

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

ljharb/qs#548 · Opened Feb 13, 2026
Dependency Dashboard Open

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

ljharb/purl#1 · Opened Jan 8, 2026
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ljharb/find-primordials#1 · Opened Jan 7, 2026
[spam] Open

invalid

Difficulty 5/5 Over a week Newbie friendliness 1/100

ljharb/actions#7 · Opened Nov 1, 2025
Performance optimization opportunities for concat-map Open

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

ljharb/concat-map#2 · 1 comment · 1 reaction · Opened Oct 5, 2025
Performance optimization opportunities for bound function calls Open

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

ljharb/call-bound#3 · 1 comment · Opened Oct 5, 2025
Performance optimization opportunities for function binding Open

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

ljharb/call-bind-apply-helpers#4 · 1 comment · Opened Oct 5, 2025
Improve README with set up instructions, better examples, and contributing guide Open

documentation help wanted

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

ljharb/list-exports#82 · 1 comment · Opened Jul 6, 2025
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ljharb/qs#528 · Opened Jun 26, 2025
Revised Performance Issue Open

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

ljharb/qs#526 · 1 comment · Opened Jun 19, 2025
`allowEmptyArrays` option disrespects `arrayFormat` Open

question

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

ljharb/qs#525 · 1 comment · Opened Jun 19, 2025
Add metric: "Auto-close issues with merged linked pull requests " Open

enhancement help wanted

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

ljharb/repo-report#96 · Opened Jun 10, 2025
Missing gOPD.js file in version 1.2.0 causes module not found error on Linux. Open

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

ljharb/gopd#2 · 1 comment · 1 reaction · Opened Mar 5, 2025
Dependency Dashboard Open

Difficulty 1/5 Under an hour Newbie friendliness 15/100

ljharb/validate-npm-package-name-cli#1 · Opened Feb 26, 2025
Cannot find module call-bind-apply-helpers Open

Difficulty 3/5 1-2 days Newbie friendliness 15/100

ljharb/call-bind-apply-helpers#3 · 3 comments · Opened Feb 25, 2025
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 15/100

ljharb/async-generator-function#1 · Opened Jan 23, 2025
Improper handling of OR ( || ) allows invalid result Open

bug help wanted

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

ljharb/ls-engines#32 · 2 comments · 2 reactions · Opened Jan 16, 2025
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 10/100

ljharb/get-proto#1 · Opened Jan 2, 2025
Dependency Dashboard Open

Difficulty 3/5 1-2 days Newbie friendliness 15/100

ljharb/set-proto#1 · Opened Dec 30, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ljharb/own-keys#1 · Opened Dec 29, 2024
Dependency Dashboard Open

Difficulty 3/5 1-2 days Newbie friendliness 20/100

ljharb/safe-push-apply#1 · Opened Dec 29, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

ljharb/mirror-own#1 · Opened Dec 28, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ljharb/safeset#1 · 1 comment · Opened Dec 28, 2024
Dependency Dashboard Open

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

ljharb/dt-clean#1 · Opened Dec 27, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 15/100

ljharb/safe-array-iterator#1 · Opened Dec 19, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

ljharb/side-channel-list#1 · Opened Dec 10, 2024
Dependency Dashboard Open

Difficulty 2/5 1-3 hours Newbie friendliness 15/100

ljharb/side-channel-map#1 · Opened Dec 10, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

ljharb/side-channel-weakmap#1 · Opened Dec 10, 2024
React 19 PropTypes Deprecation - Future Strategy Open

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

ljharb/prop-types-tools#80 · 2 comments · Opened Dec 9, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 15/100

ljharb/call-bind-apply-helpers#1 · Opened Dec 4, 2024
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ljharb/call-bound#1 · Opened Dec 3, 2024
stringify, request supporting 'dot' as option for arrayFormat Open

feature request help wanted stringify

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

ljharb/qs#516 · 3 comments · Opened Nov 1, 2024
square brackets confuse the parser Open

bug help wanted parse stringify

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

ljharb/qs#513 · 5 comments · Opened Oct 10, 2024
Inconsistent index after .remove() / .delete() Open

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

ljharb/js-traverse#18 · 7 comments · Opened Sep 12, 2024
Dependency Dashboard Open

Difficulty 1/5 Under an hour Newbie friendliness 15/100

ljharb/gfm-footnotes#1 · Opened Sep 3, 2024
Dependency Dashboard Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

ljharb/coauthors#1 · Opened Jul 12, 2024
Does not work with builtin objects with internal slots (URL, Map, Set, etc) Open

bug help wanted

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

ljharb/js-traverse#10 · 2 comments · Opened May 29, 2024
Traverse object with Buffer field is SLOW Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

ljharb/js-traverse#9 · 6 comments · Opened May 22, 2024

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