chaijs/chai

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BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.

Stars: 8.3k
Forks: 724
Open beginner issues: 0
Indexed issues: 83
Avg merge: 1d 33m
Merged PRs (30d): 11

Dominant language: JavaScript
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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83 open issues indexed

`truncateThreshold: 0` prints `process` and triggers DeprecationWarning Open

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

chaijs/chai#1728 · 3 comments · Opened Oct 9, 2025
Dependency Dashboard Open

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

chaijs/chai#1712 · Opened Oct 2, 2025
Disable loupe's `customInspect` option to avoid collisions. Open

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

chaijs/chai#1708 · 1 comment · Opened Oct 2, 2025
Async support in core Open

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

chaijs/chai#1674 · 4 reactions · Opened Feb 19, 2025
chai v5, register-expect.js, and plugins Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

chaijs/chai#1655 · 3 comments · Opened Dec 12, 2024
Confusing and inconsistent comparison of NaN Open

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

chaijs/chai#1653 · 4 comments · Opened Nov 5, 2024
Feature Request: Type-Specific Matchers with Fallback and Inheritance Support in `expect` Open

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

chaijs/chai#1651 · Opened Oct 18, 2024
ESM node 20.17.0 issue with chai and chai-http Open

waiting-on-reporter

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

chaijs/chai#1642 · 3 comments · Opened Sep 29, 2024
BigInt are not supported in .deep.equal() Open

waiting-on-reporter

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

chaijs/chai#1623 · 3 comments · Opened Jun 6, 2024
Better user experience when using `.include` without `.deep`. Open

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

chaijs/chai#1619 · Opened May 16, 2024
without "@types/chai" my IDE didn't recognize some attributes Open

types

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

chaijs/chai#1613 · Opened May 4, 2024
use() function only returns plugin first time Open

waiting-on-reporter

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

chaijs/chai#1603 · 4 comments · Opened Feb 13, 2024
Documentation revamp Open

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

chaijs/chai#1595 · 14 comments · 1 reaction · Opened Jan 31, 2024
mutating chai exports no longer works in v5 Open

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

chaijs/chai#1569 · 25 comments · 6 reactions · Opened Jan 2, 2024
Officia type definitions for 5.x? Open

types

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

chaijs/chai#1554 · 15 comments · 1 reaction · Opened Dec 20, 2023
strictEqual / deepStrictEqual behave differently on numbers Open

question

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

chaijs/chai#1532 · 7 comments · Opened Aug 3, 2023
`chai.should()` break error reporting in `node:test` on node `18.17.0` Open

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

chaijs/chai#1530 · Opened Jul 25, 2023
`isAtLeast()` creates misleading output Open

pull-request-wanted

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

chaijs/chai#1518 · 2 comments · Opened Apr 28, 2023
non-enumerable Symbol properties should not fail equality Open

waiting-on-reporter

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

chaijs/chai#1509 · 2 comments · 1 reaction · Opened Feb 27, 2023
[Feature Request] Search Bar on www Open

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

chaijs/chai#1494 · 1 comment · Opened Dec 16, 2022
Security vulnerability - Prototype pollution found in npm package - chai Open

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

chaijs/chai#1492 · Opened Dec 9, 2022
Why do object->deep.include and array.of.object->deep.include behave differently? Open

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

chaijs/chai#1479 · 1 comment · 2 reactions · Opened Sep 5, 2022
Plugin: how to get calling test file's info Open

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

chaijs/chai#1477 · Opened Aug 19, 2022
Test using revertedWith function passes correctly despite other message Open

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

chaijs/chai#1471 · Opened Jun 14, 2022
Mongoose v6 ObjectId deepEqual always true Open

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

chaijs/chai#1470 · 3 comments · Opened Jun 13, 2022
Comparing deep members between two different unsorted arrays doesn't produce accurate errors Open

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

chaijs/chai#1462 · 1 reaction · Opened Mar 10, 2022
Can expect().to.deep.include() return multiple differences? Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

chaijs/chai#1452 · Opened Feb 9, 2022
index.mjs imports invalid module Open

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

chaijs/chai#1450 · 6 comments · 4 reactions · Opened Feb 1, 2022
Checking multiple properties of the same error Open

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

chaijs/chai#1441 · 5 comments · Opened Jan 11, 2022
should.be() / expect().to.be() syntax Open

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

chaijs/chai#1440 · Opened Jan 3, 2022
Define BDD when used in user documentation Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

chaijs/chai#1409 · 3 comments · Opened Aug 1, 2021
Make expect(false) work as a failing assertion Open

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

chaijs/chai#1408 · 5 comments · Opened Jul 28, 2021
Consider a new, informative page in Chai's documentation for working with Errors Open

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

chaijs/chai#1405 · 2 comments · Opened Jun 25, 2021
Error: getaddrinfo ENOTFOUND with Docker in chai test Open

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

chaijs/chai#1404 · 1 comment · Opened Jun 25, 2021
Mangled exception handling with `chai-as-promised` leads to mocha silently exiting without reporting an error Open

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

chaijs/chai#1402 · 8 comments · Opened Jun 9, 2021
lengthOf - comparing lengths of 2 arrays/objects is discouraging, lengthsEqual needed Open

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

chaijs/chai#1390 · Opened May 8, 2021
Improve API reference Open

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

chaijs/chai#1385 · 1 comment · Opened Apr 8, 2021
Errors metadata testing issues Open

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

chaijs/chai#1370 · Opened Jan 18, 2021
Using deep.members to compare two error object arrays does not work Open

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

chaijs/chai#1368 · Opened Dec 23, 2020
how to check component methods calledOnce Open

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

chaijs/chai#1367 · 1 comment · Opened Dec 8, 2020
Ignore property with list type Open

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

chaijs/chai#1366 · 1 comment · Opened Nov 5, 2020
"to.not.have.key(key)" produces unexpected results Open

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

chaijs/chai#1364 · 4 comments · 1 reaction · Opened Oct 7, 2020
Verbose report on expectation failure Open

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

chaijs/chai#1362 · Opened Sep 9, 2020
expect().should should warn Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

chaijs/chai#1360 · 1 comment · Opened Sep 1, 2020
expected [Function] to throw 'RangeError' but 'RangeError' was thrown Open

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

chaijs/chai#1357 · 1 comment · Opened Aug 18, 2020
Allow configuring inspection depth Open

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

chaijs/chai#1352 · 1 comment · 3 reactions · Opened Jul 7, 2020
Expect/should API page contains duplicated fail description Open

Difficulty 1/5 Under an hour Newbie friendliness 42/100

chaijs/chai#1347 · 1 comment · Opened Jun 11, 2020
Chai version upgrade error (~3.5.0 → ~4.2.0) Open

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

chaijs/chai#1345 · 1 comment · Opened Jun 9, 2020
Broken "above" or "not"? Open

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

chaijs/chai#1343 · 1 comment · Opened Jun 4, 2020
API Design Question: Why does assert.deepEqual() not behave like expect().deep.equal()? Open

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

chaijs/chai#1342 · Opened Jun 4, 2020

chaijs/chai

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