JavaScript

Environment

Qualified supports Node 22, 18, 14, 12, 10, 8 and 6.

Node versions older than 18 are deprecated. Use Node 22.

Timeout

The sandbox environment will timeout the code within 12 seconds.

Node Packages

The following packages have been installed:

Node 22

Default (no preset)

@faker-js/faker: 8.4.1
axios: 1.6.8
canvas: 3.0.0
chai: 4.4.1
chai-http: 4.3.0
cheerio: 1.0.0
express: 4.19.2
fast-check: 3.17.2
jest: 29.7.0
jsdom: 24.0.0
knex: 3.1.0
mocha: 10.3.0
mongodb: 6.5.0
mongoose: 8.2.3
pg: 8.11.3
ramda: 0.29.1
redis: 4.6.13
sequelize: 6.37.1
sinon: 17.0.1
socket.io: 4.7.4
socket.io-client: 4.7.4
sqlite3: 5.1.7
supertest: 6.3.4

React (`react` preset)

@testing-library/dom: 10.1.0
@testing-library/jest-dom: 6.4.2
@testing-library/react: 15.0.5
@testing-library/user-event: 14.5.2
jest: 29.7.0
mobx: 6.12.0
mobx-react: 9.1.1
react: 18.2.0
react-dom: 18.2.0
react-redux: 9.1.0
react-router-dom: 6.22.3
react-test-renderer: 18.2.0
redux: 5.0.1

Vue (`vue` preset)

@testing-library/dom: 10.1.0
@testing-library/jest-dom: 6.4.2
@testing-library/vue: 8.0.3
jest: 29.7.0
vue: 3.4.21
vuex: 4.1.0

Node 18

Default (no preset)

@babel/core: 7.20.5
@babel/preset-env: 7.20.2
@babel/register: 7.18.9
@babel/runtime: 7.20.6
@codewars/jest-reporter: 1.0.3
@codewars/mocha-reporter: 1.0.0
@codewars/test-compat: 1.1.0
@faker-js/faker: 7.6.0
axios: 1.2.1
babel-jest: 29.3.1
bcrypt: 5.1.0
bignumber.js: 9.1.1
body-parser: 1.20.1
canvas: 2.10.2
chai: 4.3.7
chai-http: 4.3.0
cheerio: 1.0.0-rc.12
cookie-parser: 1.4.6
cors: 2.8.5
dotenv: 16.0.3
escape-html: 1.0.3
esm: 3.2.25
espower-loader: 1.2.2
express: 4.18.2
fast-check: 3.4.0
jest: 29.3.1
jsdom: 20.0.3
knex: 2.3.0
lodash: 4.17.21
mocha: 10.2.0
mongodb: 4.12.1
mongoose: 6.8.0
nanoid: 4.0.0
node-fetch: 3.3.0
objection: 3.0.1
pg: 8.8.0
pg-hstore: 2.3.4
pino: 8.8.0
pino-http: 8.3.0
power-assert: 1.6.1
query-string: 8.0.3
ramda: 0.28.0
redis: 4.5.1
sequelize: 6.27.0
sinon: 15.0.1
sinon-chai: 3.7.0
socket.io: 4.5.4
socket.io-client: 4.5.4
sqlite3: 5.1.4
supertest: 6.3.3

React (`react` preset)

@babel/core: 7.20.5
@babel/plugin-proposal-class-properties: 7.18.6
@babel/preset-env: 7.20.2
@babel/preset-react: 7.18.6
@babel/runtime: 7.20.6
@codewars/jest-reporter: 1.0.3
@testing-library/dom: 8.19.0
@testing-library/jest-dom: 5.16.5
@testing-library/react: 13.4.0
@testing-library/user-event: 14.4.3
axios: 1.2.1
babel-jest: 29.3.1
classnames: 2.3.2
cross-fetch: 3.1.5
escape-html: 1.0.3
immer: 9.0.16
jest: 29.3.1
jest-environment-jsdom: 29.3.1
jest-fetch-mock: 3.0.3
jest-snapshot: 29.3.1
marked: 4.2.4
mobx: 6.7.0
mobx-react: 7.6.0
nanoid: 4.0.0
prop-types: 15.8.1
react: 18.2.0
react-cookie: 4.1.1
react-dom: 18.2.0
react-is: 18.2.0
react-redux: 8.0.5
react-router-dom: 6.4.5
react-test-renderer: 18.2.0
redux: 4.2.0
reselect: 4.1.7
sinon: 15.0.1
styled-components: 5.3.6
use-immer: 0.8.1

Node 14

Default (no preset)

@babel/core: 7.16.5
@babel/preset-env: 7.16.5
@babel/register: 7.16.5
@babel/runtime: 7.16.5
@codewars/jest-reporter: 1.0.3
@codewars/mocha-reporter: 1.0.0
@codewars/test-compat: 1.1.0
axios: 0.24.0
babel-jest: 27.4.5
bcrypt: 5.0.1
bignumber.js: 9.0.2
body-parser: 1.19.1
chai: 4.3.4
chai-http: 4.3.0
cheerio: 1.0.0-rc.10
cookie-parser: 1.4.6
cors: ^2.8.5
dotenv: ^10.0.0
escape-html: 1.0.3
esm: 3.2.25
espower-loader: 1.2.2
express: 4.17.2
faker: 5.5.3
fast-check: 2.20.0
jest: 27.4.5
jsdom: 19.0.0
knex: 0.95.14
lodash: 4.17.21
mocha: 9.1.3
mongodb: 4.2.2
mongoose: 6.1.3
nanoid: ^3.1.30
node-fetch: ^3.1.0
objection: 3.0.0
pg: 8.7.1
pg-hstore: 2.3.4
pino: ^7.6.0
pino-http: ^6.5.0
power-assert: 1.6.1
query-string: 7.0.1
ramda: 0.27.1
redis: 4.0.1
sequelize: 6.12.1
sinon: 12.0.1
sinon-chai: 3.7.0
socket.io: 4.4.0
socket.io-client: 4.4.0
sqlite3: 5.0.2
supertest: ^6.1.6

React (`react` preset)

@babel/core: 7.16.5
@babel/plugin-proposal-class-properties: 7.16.5
@babel/preset-env: 7.16.5
@babel/preset-react: 7.16.5
@babel/runtime: 7.16.5
@codewars/jest-reporter: ^1.0.3
@testing-library/dom: 8.11.1
@testing-library/jest-dom: ^5.16.1
@testing-library/react: 12.1.2
@testing-library/react-hooks: 7.0.2
@testing-library/user-event: 13.5.0
axios: 0.24.0
babel-jest: 27.4.5
classnames: 2.3.1
cross-fetch: 3.1.4
escape-html: 1.0.3
immer: 9.0.7
jest: 27.4.5
jest-environment-jsdom: 27.4.4
jest-fetch-mock: 3.0.3
jest-snapshot: 27.4.5
marked: 4.0.8
mobx: 6.3.9
mobx-react: 7.2.1
nanoid: ^3.1.30
prop-types: 15.7.2
react: 17.0.2
react-cookie: 4.1.1
react-dom: 17.0.2
react-is: ^17.0.2
react-redux: 7.2.6
react-router-dom: 6.2.1
react-test-renderer: 17.0.2
redux: 4.1.2
reselect: 4.1.5
sinon: 12.0.1
styled-components: 5.3.3
use-immer: 0.6.0

Vue (`vue` preset)

@babel/core: 7.16.5
@babel/plugin-transform-runtime: 7.16.5
@babel/preset-env: 7.16.5
@babel/runtime: 7.16.5
@codewars/jest-reporter: ^1.0.3
@testing-library/dom: 8.11.1
@testing-library/jest-dom: ^5.16.1
@testing-library/vue: 6.4.2
@vue/compiler-sfc: ^3.2.26
@vue/vue3-jest: ^27.0.0-alpha.4
axios: 0.24.0
babel-core: ^7.0.0-bridge.0
babel-jest: 27.4.5
babel-plugin-dynamic-import-node: 2.3.3
cross-fetch: 3.1.4
jest: 27.4.5
jest-fetch-mock: 3.0.3
jest-serializer-vue: 2.0.2
jest-transform-stub: 2.0.0
sinon: 12.0.1
vue: 3.2.26
vuex: 4.0.2

Node 12

Default (no preset)

@babel/core: 7.10.5
@babel/preset-env: 7.10.4
@babel/register: 7.10.5
@babel/runtime: 7.10.5
@codewars/test-compat: 1.1.0
axios: 0.19.2
babel-jest: 26.1.0
bcrypt: 5.0.0
bignumber.js: 9.0.0
body-parser: 1.19.0
chai: 4.3.4
chai-http: 4.3.0
cheerio: 1.0.0-rc.3
cookie-parser: 1.4.5
cors: ^2.8.5
dotenv: ^8.2.0
escape-html: 1.0.3
esm: 3.2.25
espower-loader: 1.2.2
express: 4.17.1
faker: 4.1.0
fast-check: 1.26.0
jest: 26.1.0
jsdom: 16.3.0
knex: 0.21.6
lodash: 4.17.19
mocha: 8.3.0
mongodb: 3.5.9
mongoose: 5.9.24
nanoid: ^3.1.20
node-fetch: ^2.6.1
objection: 2.2.1
pg: 8.3.0
pg-hstore: 2.3.3
pino: ^6.11.0
pino-http: ^5.3.0
power-assert: 1.6.1
query-string: 6.13.1
ramda: 0.27.0
redis: 3.0.2
sequelize: 6.3.3
sinon: 9.0.2
sinon-chai: 3.5.0
socket.io: 2.3.0
socket.io-client: 2.3.0
sqlite3: 5.0.0
supertest: ^4.0.2

React (`react` preset)

@babel/core: 7.10.5
@babel/plugin-proposal-class-properties: 7.10.4
@babel/preset-env: 7.10.4
@babel/preset-react: 7.10.4
@babel/runtime: 7.10.5
@testing-library/dom: 7.21.0
@testing-library/jest-dom: ^5.11.1
@testing-library/react: 10.4.7
@testing-library/react-hooks: 3.3.0
@testing-library/user-event: 12.0.11
axios: 0.19.2
babel-jest: 26.1.0
classnames: 2.2.6
cross-fetch: 3.0.5
enzyme: 3.11.0
enzyme-adapter-react-16: 1.15.2
enzyme-to-json: 3.5.0
escape-html: 1.0.3
immer: 7.0.5
jest: 26.1.0
jest-environment-jsdom: 26.1.0
jest-fetch-mock: 3.0.3
jest-snapshot: 26.1.0
marked: 1.1.1
mobx: 5.15.4
mobx-react: 6.2.2
prop-types: 15.7.2
react: 16.13.1
react-cookie: 4.0.3
react-dom: 16.13.1
react-is: ^16.13.1
react-redux: 7.2.0
react-router-dom: 5.2.0
react-test-renderer: 16.13.1
rebass: 4.0.7
recompose: 0.30.0
redux: 4.0.5
reselect: 4.0.0
sinon: 9.0.2
styled-components: 5.1.1
styled-system: 5.1.5
use-immer: 0.4.0

React Native (`react-native` preset)

@babel/core: ^7.13.15
@codewars/jest-reporter: ^1.0.3
@testing-library/jest-native: ^4.0.1
@testing-library/react-native: ^7.2.0
babel-jest: ^26.6.3
jest: ^26.6.3
metro-react-native-babel-preset: ^0.65.2
react: ^17.0.2
react-dom: ^17.0.2
react-native: ^0.64.0
react-native-web: ^0.15.6
react-test-renderer: ^17.0.2

Vue (`vue` preset)

@babel/core: 7.10.5
@babel/plugin-transform-runtime: 7.10.5
@babel/preset-env: 7.10.4
@babel/runtime: 7.10.5
@testing-library/dom: 7.21.0
@testing-library/jest-dom: ^5.11.1
@testing-library/vue: 5.0.4
@vue/test-utils: 1.0.3
axios: 0.19.2
babel-core: ^7.0.0-bridge.0
babel-jest: 26.1.0
babel-plugin-dynamic-import-node: 2.3.3
cross-fetch: 3.0.5
jest: 26.1.0
jest-fetch-mock: 3.0.3
jest-serializer-vue: 2.0.2
jest-transform-stub: 2.0.0
sinon: 9.0.2
vue: 2.6.11
vue-jest: ^3.0.6
vue-template-compiler: 2.6.11
vuex: 3.5.1

Node 10

Since Node 10, we have multiple presets for different kinds of challenges.

Default (no preset)

@babel/core: ^7.2.2
@babel/preset-env: ^7.3.1
@babel/register: ^7.0.0
@babel/runtime: ^7.3.1
axios: ^0.18.0
babel-jest: ^24.7.1
bcrypt: ^3.0.7
bignumber.js: ^8.0.1
body-parser: ^1.19.0
chai: ^4.2.0
chai-http: ^4.2.1
cheerio: ^1.0.0-rc.2
cookie-parser: ^1.4.4
escape-html: ^1.0.3
esm: ^3.1.3
espower-loader: ^1.2.2
express: ^4.16.4
faker: ^4.1.0
fast-check: ^1.8.1
jest: ^24.7.1
jsdom: ^13.0.0
knex: ^0.16.3
lodash: ^4.17.11
mocha: ^5.2.0
mongodb: ^3.1.10
mongoose: ^5.3.14
pg: ^7.7.1
pg-hstore: ^2.3.2
power-assert: ^1.6.1
query-string: ^6.10.1
ramda: ^0.26.1
redis: ^2.8.0
sequelize: ^4.42.0
sinon: ^7.1.1
sinon-chai: ^3.3.0
socket.io: ^2.2.0
socket.io-client: ^2.2.0
sqlite3: ^4.0.4

React (`react` preset)

@babel/core: 7.4.3
@babel/plugin-proposal-class-properties: 7.4.4
@babel/preset-env: 7.4.3
@babel/preset-react: 7.0.0
@babel/runtime: 7.4.3
@testing-library/dom: 5.2.1
@testing-library/react: 8.0.1
@testing-library/react-hooks: 1.0.2
@testing-library/user-event: 4.1.0
axios: 0.18.0
babel-jest: 24.7.1
classnames: 2.2.6
cross-fetch: 3.0.4
enzyme: 3.10.0
enzyme-adapter-react-16: 1.15.1
enzyme-to-json: 3.4.3
escape-html: 1.0.3
immer: 3.1.3
jest: 24.9.0
jest-dom: 3.5.0
jest-environment-jsdom: 24.9.0
jest-fetch-mock: 2.1.2
jest-snapshot: 24.9.0
marked: 0.8.0
mobx: 5.9.4
mobx-react: 5.4.3
prop-types: 15.7.2
react: 16.12.0
react-cookie: 4.0.3
react-dom: 16.12.0
react-redux: 7.0.3
react-router-dom: 5.1.2
react-test-renderer: 16.12.0
rebass: 3.1.2
recompose: 0.30.0
redux: 4.0.1
reselect: 4.0.0
sinon: 7.3.1
styled-components: 4.3.2
styled-system: 5.0.16
use-immer: 0.3.3

Vue (`vue` preset)

@babel/core: 7.4.4
@babel/plugin-transform-runtime: 7.4.4
@babel/preset-env: 7.4.4
@babel/runtime: 7.4.4
@testing-library/dom: 5.2.1
@testing-library/vue: 1.0.3
@vue/test-utils: 1.0.0-beta.29
axios: 0.18.0
babel-jest: 24.8.0
babel-plugin-dynamic-import-node: 2.2.0
cross-fetch: 3.0.4
jest: 24.8.0
jest-dom: 3.5.0
jest-fetch-mock: 2.1.2
jest-serializer-vue: 2.0.2
jest-transform-stub: 2.0.0
sinon: 7.3.2
vue: 2.6.10
vue-jest: vuejs/vue-jest#abcaaf2f0cc580d84f36c125110c7320d3f4a6b6
vue-template-compiler: 2.6.10
vuex: 3.1.1

Node 8

axios: 0.15.3
babel-core: 6.26.0
babel-preset-env: 1.6.0
babel-preset-react: 6.24.1
babel-preset-stage-3: 6.24.1
bignumber.js: 4.0.4
bluebird: 3.5.1
brain: 0.7.0
canvas: 1.6.7
chai: 3.5.0
chai-http: 3.0.0
chai-spies: 0.7.1
cheerio: 0.22.0
crypto-js: 3.1.9-1
enzyme: 2.9.1
escape-html: 1.0.3
espower-loader: 1.2.2
expect: 1.20.2
express: 4.16.1
faker: 3.1.0
jsdom: 10.1.0
lodash: 4.17.4
mocha: 3.5.3
moment: 2.18.1
mongodb: 2.2.33
mongoose: 4.10.8
pg: 7.4.0
power-assert: 1.5.0
ramda: 0.23.0
react: 15.6.2
react-addons-test-utils: 15.6.2
react-dom: 15.6.2
react-redux: 4.4.8
react-test-renderer: 15.6.2
redis: 2.8.0
redux: 3.7.2
should: 8.4.0
sinon: 1.17.7
sqlite3: 3.1.13

Node 6

axios: 0.15.3
babel-core: 6.26.0
babel-preset-env: 1.6.0
babel-preset-react: 6.24.1
babel-preset-stage-3: 6.24.1
bignumber.js: 4.0.4
bluebird: 3.5.1
brain: 0.7.0
canvas: 1.6.7
chai: 3.5.0
chai-http: 3.0.0
chai-spies: 0.7.1
cheerio: 0.22.0
enzyme: 2.9.1
escape-html: 1.0.3
espower-loader: 1.2.2
expect: 1.20.2
express: 4.16.1
faker: 3.1.0
ganache-core: 2.1.0
jsdom: 10.1.0
lodash: 4.17.4
mocha: 3.5.3
moment: 2.18.1
mongodb: 2.2.33
mongoose: 4.10.8
pg: 7.4.0
power-assert: 1.5.0
q: 1.5.0
ramda: 0.23.0
react: 15.6.2
react-addons-test-utils: 15.6.2
react-dom: 15.6.2
react-redux: 4.4.8
react-test-renderer: 15.6.2
redis: 2.8.0
redux: 3.7.2
should: 8.4.0
sinon: 1.17.7
sqlite3: 3.1.13
underscore: 1.8.3
web3: 1.0.0-beta.34

Testing

Our JavaScript environment supports the following testing frameworks:

Java Kotlin

On this page

JavaScript

Environment

Timeout

Node Packages

Node 22

Default (no preset)

React (react preset)

Vue (vue preset)

Node 18

Default (no preset)

React (react preset)

Node 14

Default (no preset)

React (react preset)

Vue (vue preset)

Node 12

Default (no preset)

React (react preset)

React Native (react-native preset)

Vue (vue preset)

Node 10

Default (no preset)

React (react preset)

Vue (vue preset)

Node 8

Node 6

Testing

React (`react` preset)

Vue (`vue` preset)

React (`react` preset)

React (`react` preset)

Vue (`vue` preset)

React (`react` preset)

React Native (`react-native` preset)

Vue (`vue` preset)

React (`react` preset)

Vue (`vue` preset)