facebook/fbjs

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A collection of utility libraries used by other Meta JS projects.

Stars: 2k
Forks: 308
Open beginner issues: 0
Indexed issues: 45

Dominant language: JavaScript
License: MIT
Last GitHub push: Nov 14, 2025
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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45 open issues indexed

Consider removing `cross-fetch` dependency Open

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

facebook/fbjs#520 · 1 reaction · Opened Oct 27, 2023
ua-parser-js changing to AGPL license in v2.x Open

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

facebook/fbjs#519 · 4 reactions · Opened Oct 23, 2023
Analysis: 100% of dependency updates in this repository can be merged. Open

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

facebook/fbjs#516 · Opened Aug 28, 2023
Git.io deprecation notice Open

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

facebook/fbjs#483 · Opened Apr 28, 2022
Got error "Cannot destructure property 'instrument' of 'options' as it is undefined" when using with jest:27.0.4 Open

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

facebook/fbjs#441 · 2 comments · 8 reactions · Opened Jun 7, 2021
areEqual doesn't support objects with null prototypes Open

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

facebook/fbjs#416 · Opened Mar 18, 2021
[security] upgrade to latest version of isomorphic-fetch Open

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

facebook/fbjs#402 · 10 comments · 32 reactions · Opened Sep 23, 2020
Add CI check to ensure lockfiles up to date Open

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

facebook/fbjs#401 · Opened Sep 17, 2020
Low vulnerability Open

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

facebook/fbjs#398 · 4 reactions · Opened Sep 14, 2020
The getViewportDimentions on iOS returns wrong data Open

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

facebook/fbjs#358 · Opened Dec 8, 2019
ERROR in ./node_modules/fbjs/lib/setImmediate.js Module not found: Error: [CaseSensitivePathsPlugin] Open

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

facebook/fbjs#345 · 3 comments · 4 reactions · Opened May 28, 2019
fbjs assumes yarn is installed but doesn't declare it as dependency Open

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

facebook/fbjs#344 · 2 comments · 1 reaction · Opened Mar 29, 2019
Wrong Flow type of joinClasses arguments Open

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

facebook/fbjs#336 · 3 comments · Opened Feb 1, 2019
isSigned return value is the inverse of the expected value Open

signedsource

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

facebook/fbjs#314 · Opened Sep 28, 2018
add warning when using deprecated keys Open

signedsource

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

facebook/fbjs#313 · 1 comment · Opened Sep 28, 2018
fetchWithRetries improvements Open

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

facebook/fbjs#306 · 3 reactions · Opened Sep 17, 2018
duplicate module provider errors when I flow check my project Open

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

facebook/fbjs#294 · 5 comments · Opened Jun 12, 2018
"global is not defined" in setImmediate.js on v0.8.16 Open

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

facebook/fbjs#290 · 10 comments · 13 reactions · Opened May 19, 2018
A warning is thrown on chrome Open

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

facebook/fbjs#287 · Opened May 7, 2018
translateDOMPositionXY.js and effects of translate3d in Chrome browser Open

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

facebook/fbjs#273 · Opened Nov 8, 2017
`shallowEqual` on Date objects gives false positives Open

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

facebook/fbjs#264 · 2 comments · Opened Aug 24, 2017
Add test to ensure compiled Flow files are valid Open

Difficulty 3/5 1-2 days Newbie friendliness 28/100

facebook/fbjs#261 · Opened Jul 26, 2017
type annotation in keymirror doesn't get reprinted nicely, is syntax error Open

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

facebook/fbjs#260 · Opened Jul 26, 2017
Consider extracting `shallowEqual`. Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

facebook/fbjs#253 · 2 reactions · Opened Jul 15, 2017
setImmediate is broken in IE10 / IE11. Open

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

facebook/fbjs#252 · Opened Jul 13, 2017
Recommendation for warning.js file Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

facebook/fbjs#250 · 2 reactions · Opened Jul 7, 2017
let's add non-error version of 'warning' Open

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

facebook/fbjs#239 · 3 comments · 2 reactions · Opened May 9, 2017
Build failure on clean checkout Open

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

facebook/fbjs#231 · 4 comments · Opened Apr 11, 2017
check-dependencies.js breaks in v7 Open

Difficulty 2/5 1-3 hours Newbie friendliness 39/100

facebook/fbjs#213 · 2 comments · 1 reaction · Opened Jan 18, 2017
Improve .flow file generation Open

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

facebook/fbjs#206 · Opened Dec 7, 2016
fetchWithRetries.js error message Open

Difficulty 1/5 Under an hour Newbie friendliness 30/100

facebook/fbjs#205 · Opened Dec 7, 2016
"opensource" eslint feedback Open

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

facebook/fbjs#204 · Opened Dec 6, 2016
"startsWith" doesn't work with IE Open

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

facebook/fbjs#193 · 3 comments · 9 reactions · Opened Oct 27, 2016
DataTransfer.getHTML() should not return text Open

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

facebook/fbjs#190 · 3 comments · 1 reaction · Opened Oct 8, 2016
Fix __DEV__ & Flow interaction Open

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

facebook/fbjs#185 · 1 reaction · Opened Sep 27, 2016
[preset] Does not correctly transform arrow functions in property initializers Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

facebook/fbjs#166 · 1 comment · Opened Jul 28, 2016
package: eslint-plugin-fbjs Open

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

facebook/fbjs#163 · 2 comments · Opened Jul 19, 2016
Ship CSS Transform Open

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

facebook/fbjs#143 · 2 comments · Opened Apr 29, 2016
Can we stop using Promise.prototype.done? Open

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

facebook/fbjs#136 · 1 comment · 1 reaction · Opened Apr 16, 2016
Does Promise.prototype.finally turn rejected promise to resolved in purpose? Open

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

facebook/fbjs#132 · 2 comments · Opened Mar 27, 2016
flow file rewriting results in invalid type annotation Open

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

facebook/fbjs#123 · 2 comments · Opened Mar 4, 2016
[fbjs-scripts] Babel dependency quite large for packages not using jest preprocessor Open

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

facebook/fbjs#106 · 3 comments · Opened Jan 18, 2016
_moduleMap Babel option as require path Open

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

facebook/fbjs#73 · 3 comments · Opened Oct 20, 2015
Use an argument to babel transform to determine environment Open

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

facebook/fbjs#65 · Opened Oct 1, 2015
Fail tests when not spying on warning() Open

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

facebook/fbjs#14 · Opened Jul 23, 2015

facebook/fbjs

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