Registry / devops / rollup-plugin-deassert

rollup-plugin-deassert

library1.3.0jsnpmunverified

Rollup plugin to remove assert, invariant, and similar statements from production bundles. Current stable version: 1.3.2 (2024-08-23). Release cadence: active development with frequent updates. Key differentiator: supports both ESM and CJS, ships TypeScript definitions, and handles conditional expressions. Unlike alternatives, it integrates naturally with Rollup's plugin system and respects source maps. Peer dependencies: acorn ^8.12.1 and rollup ^4.20.0.

devops testing

npm install rollup-plugin-deassert

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-DEAS

rollup-plugin-deassert

devopsjavascriptv1.3.0

Install

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Import

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Disk

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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.

deassert (rollupPlugin)

✓ import { rollupPlugin as deassert } from 'rollup-plugin-deassert'

✗ const deassert = require('rollup-plugin-deassert')

Package exports ESM primarily; named export 'rollupPlugin' must be aliased per documentation. CJS require may not work in some environments.

deassert (default)

✓ import deassert from 'rollup-plugin-deassert'

✗ import { default as deassert } from 'rollup-plugin-deassert'

The package also has a default export, but the README uses the named export pattern. Both are valid.

type DeassertOptions

✓ import type { DeassertOptions } from 'rollup-plugin-deassert'

✗ import { DeassertOptions } from 'rollup-plugin-deassert'

TypeScript types are bundled; use 'import type' for compile-time only usage to avoid runtime errors.

Example of using rollup-plugin-deassert in a Rollup config to strip assert statements from TypeScript files.

// rollup.config.js import { rollupPlugin as deassert } from 'rollup-plugin-deassert'; export default { input: 'src/index.ts', output: { file: 'dist/bundle.js', format: 'cjs' }, plugins: [ deassert({ include: ['**/*.ts'], sourcemap: true }) ] };

Debug

Known issues

gotchaDefault export may be removed in future versions; use named export 'rollupPlugin' for stability.

fix

Replace default import { deassert } from 'rollup-plugin-deassert' with named import { rollupPlugin as deassert } from 'rollup-plugin-deassert'.

affects: >=1.0.0

breakingVersion 1.3.0 introduced support for conditional expressions; previous versions would ignore assert inside ternary/if conditions.

fix

Upgrade to >=1.3.0 to handle conditional expressions.

affects: <1.3.0

gotchaIf using TypeScript, you must explicitly set include: ['**/*.ts'] in options; otherwise the plugin only processes JavaScript files.

fix

Add include: ['**/*.ts'] or appropriate glob to deassert() options.

affects: >=1.0.0

deprecatedThe package 'rollup-plugin-deassert' is deprecated in favor of the unified 'deassert' package that supports multiple bundlers.

fix

Consider migrating to the 'deassert' package for cross-bundler compatibility.

affects: >=1.0.0

Errors

Common errors & fixes

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

Package not installed or named incorrectly.

fix

Run 'npm install -D rollup-plugin-deassert' or check package.json for correct name.

TypeError: deassert is not a function

Using default import incorrectly or wrong import path.

fix

Use 'import { rollupPlugin as deassert } from 'rollup-plugin-deassert'' instead of 'import deassert from ...'.

Error: The plugin deassert does not exist or is not a function.

Incorrect import or plugin not added to rollup config.

fix

Ensure the import is correct and the plugin is included in the plugins array: plugins: [deassert()].

AssertionError [ERR_ASSERTION]: false == true

The plugin didn't remove the assert statement (e.g., when include option is missing for TypeScript).

fix

Add 'include: ["**/*.ts"]' to deassert options if using TypeScript files.

Upgrade

Version history

1.3.0latest on npm

Audit

Dependencies

acornrequiredRequired for parsing JavaScript/TypeScript AST to locate assert calls

rolluprequiredPeer dependency — plugin runs within Rollup's build pipeline

Agent activity

12 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/RebeccaStevens/deassert ↗

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