Registry / web-framework / rollup-plugin-assemblyscript

rollup-plugin-assemblyscript

library2.0.0jsnpmunverified

A Rollup plugin (v2.0.0) that imports AssemblyScript (.as) files and compiles them on-the-fly into WebAssembly modules. It supports custom compiler options, a configurable import matcher (default `asc:` prefix), and optional integration with as-bind for high-level type bindings. Distinct from other WASM plugins by targeting AssemblyScript specifically and offering tight rollup integration. Requires AssemblyScript and as-bind as peer dependencies. Maintained by the AssemblyScript team.

web-framework data serialization

npm install rollup-plugin-assemblyscript

package ↗homepage ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-ASSE

rollup-plugin-assemblyscript

web-frameworkjavascriptv2.0.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

asc

✓ import { asc } from 'rollup-plugin-assemblyscript'

Default and named exports are merged; both `asc` and `default` work. v2.0.0 uses ESM.

Plugin (via default import)

✓ import ascPlugin from 'rollup-plugin-assemblyscript'

✗ const ascPlugin = require('rollup-plugin-assemblyscript')

Package is ESM-only in v2; CJS require will throw. Use dynamic import or transpiler.

Import specifier `asc:`

✓ import wasmUrl from 'asc:./addition.as'

✗ import wasm from './addition.as'

Imports must use the `asc:` prefix (default matcher) to trigger compilation. Without prefix, Rollup treats it as a regular file.

Shows minimal rollup config using asc plugin with compiler options, default matcher, and as-bind disabled.

// rollup.config.js import { asc } from 'rollup-plugin-assemblyscript'; import { defineConfig } from 'rollup'; export default defineConfig({ input: 'src/main.js', output: { dir: 'dist', format: 'esm' }, plugins: [ asc({ compilerOptions: { optimizeLevel: 3 }, matcher: /^asc:/, useAsBind: false }) ] });

Debug

Known issues

breakingv2.0.0 migrated to ESM-only; CJS require() will fail.

fix

Use ESM imports or dynamic import('rollup-plugin-assemblyscript').

affects: >=2.0.0

deprecatedImport specifier `assemblyscript:` prefix deprecated in v2; use `asc:` instead.

fix

Change imports from `assemblyscript:./file.as` to `asc:./file.as`.

affects: >=2.0.0

brokenMissing peer dependencies (assemblyscript or as-bind) cause runtime errors.

fix

npm install assemblyscript as-bind

affects: *

gotchaThe plugin compiles files matching the matcher into WASM URLs; imported value is a string URL, not a module instance.

fix

Use the URL with WebAssembly.instantiateStreaming or fetch.

affects: *

gotchaIf `useAsBind: true`, as-bind library must be installed and import runtime requires `--exportRuntime` flag (automatically set by plugin).

fix

Ensure as-bind is installed and use `import * as wasm from 'asc:./file.as'` to get bindings.

affects: *

Errors

Common errors & fixes

Error: Cannot find module 'rollup-plugin-assemblyscript'

Package not installed or CJS require used in ESM-only version.

fix

Run: npm install rollup-plugin-assemblyscript
Use: import { asc } from 'rollup-plugin-assemblyscript'

[!] Error: The requested module 'rollup-plugin-assemblyscript' does not provide an export named 'asc'

Importing v1 style (named export 'asc' not available in older versions).

fix

If using v1: import asc from 'rollup-plugin-assemblyscript'
If using v2: import { asc } from 'rollup-plugin-assemblyscript'

TypeError: asc is not a function

Wrong import or plugin not called.

fix

Correct usage: plugins: [asc()] (call the function), not plugins: [asc]

Upgrade

Version history

2.0.0latest on npm

Audit

Dependencies

assemblyscriptrequiredPeer dependency; required for compilation of .as files

as-bindoptionalOptional peer dependency; enables high-level bindings when useAsBind is set

Agent activity

5 hits · last 30 days

node

OpenAI (training)

Resources

packagehttps://www.npmjs.com/package/rollup-plugin-assemblyscript ↗

homepagehttps://www.assemblyscript.org ↗