Platform Compatibility ​

viem supports all modern browsers (Chrome, Edge, Firefox, etc) & runtime environments (Node 18+, Deno, Bun, etc).

viem uses modern EcmaScript features such as:

• BigInt
• fetch
• Error cause
• TextEncoder encode

You can check support for these features on Can I use...

Polyfills ​

If your platform does not support one of the required features, it is also possible to import a polyfill.

fetch ​

• isomorphic-unfetch
• node-fetch

Error cause ​

• core-js

TextEncoder ​

• FastestSmallestTextEncoderDecoder