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url: https://docs.tailor.tech/guides/function/appendix.md
---

# Appendix

## Operation confirmed packages in Function Service

These packages are confirmed to work in Function Service.\
Function service can use any npm packages not depending node runtime API.\
Please contact us if you have any questions or issues when you use these packages.

### Web Standard API

#### Crypto

* https://developer.mozilla.org/en-US/docs/Web/API/Crypto
* https://developer.mozilla.org/en-US/docs/Web/API/CryptoKey
* https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto

#### URL

* https://developer.mozilla.org/en-US/docs/Web/API/URL
* https://developer.mozilla.org/en-US/docs/Web/API/URLPattern
* https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams

#### Web

* https://developer.mozilla.org/en-US/docs/Web/API/Fetch\_API
* https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream
* https://developer.mozilla.org/en-US/docs/Web/API/WritableStream
* https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder
* https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder

#### Window

* https://developer.mozilla.org/en-US/docs/Web/API/Window/btoa
* https://developer.mozilla.org/en-US/docs/Web/API/Window/atob
* https://developer.mozilla.org/en-US/docs/Web/API/Window/clearInterval
* https://developer.mozilla.org/en-US/docs/Web/API/Window/clearTimeout
* https://developer.mozilla.org/en-US/docs/Web/API/Window/setInterval
* https://developer.mozilla.org/en-US/docs/Web/API/Window/setTimeout

### NPM modules

#### Date

* https://moment.github.io/luxon/#/
* https://day.js.org/
* https://date-fns.org/

#### Utility

* https://remedajs.com/
* https://lodash.com/
* https://underscorejs.org/

#### Big

* https://github.com/MikeMcl/big.js/wiki

#### Fetch

* https://github.com/axios/axios
* https://github.com/developit/redaxios

#### GraphQL

* https://www.npmjs.com/package/graphql-request
* https://www.npmjs.com/package/graphql

### JSR modules

All deno standard libraries registered on JSR should work on FR.