Node.js compatibility

The following APIs from Node.js are available directly in the Workers runtime. To enable these APIs in your Worker, add the nodejs_compat compatibility flag to your wrangler.toml:

wrangler.toml
compatibility_flags = [ "nodejs_compat" ]

​​ Pages Functions

If you are using Pages Functions, set compatibility flags using the Pages-specific CLI commands. To set Pages compatibility flags in the Cloudflare dashboard:

1. Log into the Cloudflare dashboard Open external link and select your account.
2. Select Pages and select your Pages project.
3. Select Settings > Functions > Compatibility Flags.
4. Configure your Production and Preview compatiblity flags as needed.

• assert
• AsyncLocalStorage
• Buffer
• EventEmitter
• util