Standard Library

Deno provides a set of standard modules that are audited by the core team and are guaranteed to work with Deno.

The standard library is hosted on JSR and is available at: https://jsr.io/@std. Packages are documented, tested, and include usage examples.

Versioning and stability Jump to heading#

Each package of the standard library is independently versioned. Packages follow semantic versioning rules. You can use version pinning or version ranges to prevent breaking changes.

// imports the latest 1.x version of `copy` from the `fs` package
import { copy } from "jsr:@std/fs@^1.0.0";

More examples of semver version selection syntax can be found in the @std/semver package documentation.