Runtime evidence / smoke tested

preact11.0.0

Observed 2026-10-09 06:03 UTC · Linux amd64 / glibc

Download JSON

Version summary · Observation 0 · Report history · Maintainer tools (coming soon)

Inconclusive

All applicable planned loading observations completed.

This is loading evidence. It does not establish functional correctness or package safety.

Runtime matrix

4 pinned runtimes · production_9ec43ff508961f8e502723462d123971

Loading outcomes by runtime and consumer mode
Runtime	Root import	Root require	Subpath imports	Subpath requires
Node.js24.21.0	Passed	Passed	Inconclusive12 passed · 2 need optional peers	Inconclusive12 passed · 2 need optional peers
Node.js26.10.0	Passed	Passed	Inconclusive12 passed · 2 need optional peers	Inconclusive12 passed · 2 need optional peers
Bun1.4.2	Passed	Passed	Mixed results12 passed · 2 failed	Inconclusive12 passed · 1 failed · 1 needs an optional peer
Deno2.9.7	Passed	Passed	Inconclusive12 passed · 2 need optional peers	Inconclusive12 passed · 2 need optional peers

Node.js 24.21.0

Root importPassed

Root requirePassed

Subpath importsInconclusive12 passed · 2 need optional peers

Subpath requiresInconclusive12 passed · 2 need optional peers

Node.js 26.10.0

Root importPassed

Root requirePassed

Subpath importsInconclusive12 passed · 2 need optional peers

Subpath requiresInconclusive12 passed · 2 need optional peers

Bun 1.4.2

Root importPassed

Root requirePassed

Subpath importsMixed results12 passed · 2 failed

Subpath requiresInconclusive12 passed · 1 failed · 1 needs an optional peer

Deno 2.9.7

Root importPassed

Root requirePassed

Subpath importsInconclusive12 passed · 2 need optional peers

Subpath requiresInconclusive12 passed · 2 need optional peers

Import uses ESM; require uses CommonJS. Root modes use fresh sandboxes. Subpath batches share module caches and globals. Select a result to inspect its evidence.

Does preact work in Node.js, Bun and Deno?

All applicable planned loading checks completed. The runtimes used the same installed dependency snapshot. Test environment: Linux amd64 / glibc, with install scripts and execution networking disabled. Successful import or require does not prove that package functions, native features or your application work.

Does preact work with Node.js?

preact@11.0.0 has inconclusive loading evidence in Node.js 24.21.0. 26 passed · 0 failed · 4 need optional peers.

preact@11.0.0 has inconclusive loading evidence in Node.js 26.10.0. 26 passed · 0 failed · 4 need optional peers.

Does preact work with Bun?

preact@11.0.0 has inconclusive loading evidence in Bun 1.4.2. 26 passed · 3 failed · 1 needs an optional peer.

Does preact work with Deno?

preact@11.0.0 has inconclusive loading evidence in Deno 2.9.7. 26 passed · 0 failed · 4 need optional peers.

Compare npm package compatibility across Node.js, Bun and Deno · Browse observed runtime loading failures

Shared preparation

Passed

1 installed packages · 0 optional dependencies omitted · lifecycle scripts disabled

The omitted count covers locked optional dependencies. Optional peers are separate and are not automatically installed.

Static manifest, native and script observations

Static indicators are context; their presence alone does not establish a prerequisite or failure.

{
  "native": {
    "count": 0,
    "paths": [],
    "buildIndicators": [],
    "prerequisiteProven": false
  },
  "declared": {
    "main": "dist/preact.mjs",
    "module": "dist/preact.mjs",
    "exports": {
      ".": {
        "types": "./src/index.d.ts",
        "default": "./dist/preact.mjs"
      },
      "./debug": {
        "types": "./debug/src/index.d.ts",
        "default": "./debug/dist/debug.mjs"
      },
      "./hooks": {
        "types": "./hooks/src/index.d.ts",
        "default": "./hooks/dist/hooks.mjs"
      },
      "./compat": {
        "types": "./compat/src/index.d.ts",
        "default": "./compat/dist/compat.mjs"
      },
      "./devtools": {
        "types": "./devtools/src/index.d.ts",
        "default": "./devtools/dist/devtools.mjs"
      },
      "./test-utils": {
        "types": "./test-utils/src/index.d.ts",
        "default": "./test-utils/dist/testUtils.mjs"
      },
      "./jsx-runtime": {
        "types": "./jsx-runtime/src/index.d.ts",
        "default": "./jsx-runtime/dist/jsxRuntime.mjs"
      },
      "./package.json": "./package.json",
      "./compat/client": {
        "types": "./compat/client.d.ts",
        "import": "./compat/client.mjs",
        "require": "./compat/client.js"
      },
      "./compat/server": {
        "types": "./compat/server.d.ts",
        "import": "./compat/server.mjs",
        "browser": "./compat/server.browser.js",
        "require": "./compat/server.js"
      },
      "./jsx-dev-runtime": {
        "types": "./jsx-runtime/src/index.d.ts",
        "default": "./jsx-runtime/dist/jsxRuntime.mjs"
      },
      "./compat/scheduler": {
        "types": "./compat/scheduler.d.ts",
        "import": "./compat/scheduler.mjs",
        "require": "./compat/scheduler.js"
      },
      "./compat/test-utils": {
        "types": "./test-utils/src/index.d.ts",
        "default": "./test-utils/dist/testUtils.mjs"
      },
      "./compat/jsx-runtime": {
        "types": "./jsx-runtime/src/index.d.ts",
        "import": "./compat/jsx-runtime.mjs",
        "require": "./compat/jsx-runtime.js"
      },
      "./debug/package.json": "./debug/package.json",
      "./hooks/package.json": "./hooks/package.json",
      "./compat/package.json": "./compat/package.json",
      "./compat/server.browser": {
        "types": "./compat/server.d.ts",
        "default": "./compat/server.browser.js"
      },
      "./devtools/package.json": "./devtools/package.json",
      "./compat/jsx-dev-runtime": {
        "types": "./jsx-runtime/src/index.d.ts",
        "import": "./compat/jsx-dev-runtime.mjs",
        "require": "./compat/jsx-dev-runtime.js"
      },
      "./test-utils/package.json": "./test-utils/package.json",
      "./jsx-runtime/package.json": "./jsx-runtime/package.json"
    },
    "scripts": {
      "dev": "node ./scripts/build.mjs --watch",
      "tsc": "tsc -p jsconfig-lint.json",
      "lint": "run-s oxlint tsc",
      "test": "npm-run-all build lint test:unit",
      "build": "node ./scripts/build.mjs",
      "format": "oxfmt . --write",
      "oxlint": "oxlint src test/browser test/node test/shared debug compat hooks test-utils",
      "test:ts": "run-p 'test:ts:*'",
      "dev:hooks": "node ./scripts/build.mjs --watch hooks",
      "postbuild": "node ./config/compat-entries.js",
      "test:unit": "run-p test:vitest:min test:ts",
      "dev:compat": "node ./scripts/build.mjs --watch compat",
      "test:vitest": "cross-env COVERAGE=true vitest run",
      "format:check": "oxfmt --check .",
      "test:install": "playwright install chromium",
      "test:ts:core": "tsc -p test/ts/",
      "test:ts:compat": "tsc -p compat/test/ts/",
      "test:vitest:min": "cross-env MINIFY=true vitest run",
      "test:vitest:watch": "vitest"
    },
    "devDependencies": {
      "chai": "^6.2.2",
      "husky": "^9.1.7",
      "oxfmt": "^0.32.0",
      "oxlint": "^1.8.0",
      "rollup": "^4.62.2",
      "terser": "5.16.0",
      "vitest": "^5.0.0",
      "kolorist": "^1.8.0",
      "cross-env": "^7.0.3",
      "playwright": "^1.54.1",
      "prop-types": "^15.8.1",
      "typescript": "5.1.6",
      "@babel/core": "^7.28.0",
      "@types/chai": "^5.2.2",
      "@types/node": "^22.20.1",
      "nano-staged": "^1.0.2",
      "npm-run-all2": "^7.0.0",
      "@vitest/browser": "^5.0.0",
      "@babel/preset-env": "^7.29.7",
      "@vitest/coverage-v8": "^5.0.0",
      "@rollup/plugin-babel": "^6.1.0",
      "preact-render-to-string": "^6.5.0",
      "@vitest/browser-playwright": "^5.0.0",
      "babel-plugin-transform-rename-properties": "0.1.0"
    },
    "peerDependencies": {
      "preact-render-to-string": ">=6.7.0"
    },
    "peerDependenciesMeta": {
      "preact-render-to-string": {
        "optional": true
      }
    }
  },
  "platform": {
    "os": true,
    "cpu": true,
    "libc": true
  },
  "evidenceLevel": "static_only",
  "lifecycleScripts": []
}

Coverage and evidence

Node.js 24.21.0 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 24.21.0 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 24.21.0 · Subpaths · ESM importInconclusive

12 passed · 2 need optional peers · 14 observed of 14 planned

Missing optional peers explain 2 of 2 recorded failed load attempts.

Requires optional peer: preact-render-to-string
Declared range: >=6.7.0. This dependency was not installed in the tested snapshot. Compatibility for this entry is inconclusive; the loading error does not establish a runtime incompatibility.

optional_peer_missing · module resolution
Cannot find package 'preact-render-to-string' imported from /workspace/node_modules/preact/compat/server.mjs

Evidence JSON

Node.js 24.21.0 · Subpaths · CommonJS requireInconclusive

12 passed · 2 need optional peers · 14 observed of 14 planned

Missing optional peers explain 2 of 2 recorded failed load attempts.

optional_peer_missing · module resolution
renderToString() error: missing "preact-render-to-string" dependency.

Evidence JSON

Node.js 26.10.0 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 26.10.0 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 26.10.0 · Subpaths · ESM importInconclusive

12 passed · 2 need optional peers · 14 observed of 14 planned

Missing optional peers explain 2 of 2 recorded failed load attempts.

optional_peer_missing · module resolution
Cannot find package 'preact-render-to-string' imported from /workspace/node_modules/preact/compat/server.mjs

Evidence JSON

Node.js 26.10.0 · Subpaths · CommonJS requireInconclusive

12 passed · 2 need optional peers · 14 observed of 14 planned

Missing optional peers explain 2 of 2 recorded failed load attempts.

optional_peer_missing · module resolution
renderToString() error: missing "preact-render-to-string" dependency.

Evidence JSON

Bun 1.4.2 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Bun 1.4.2 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Bun 1.4.2 · Subpaths · ESM importMixed results

12 passed · 2 failed · 14 observed of 14 planned

esm_import_failed · module evaluation
The runtime reported a loading failure without a captured error message. Its cause is unknown.

Evidence JSON

Bun 1.4.2 · Subpaths · CommonJS requireInconclusive

12 passed · 1 failed · 1 needs an optional peer · 14 observed of 14 planned

Missing optional peers explain 1 of 2 recorded failed load attempts.

optional_peer_missing · module resolution
renderToString() error: missing "preact-render-to-string" dependency.

Evidence JSON

Deno 2.9.7 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Deno 2.9.7 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Deno 2.9.7 · Subpaths · ESM importInconclusive

12 passed · 2 need optional peers · 14 observed of 14 planned

Missing optional peers explain 2 of 2 recorded failed load attempts.

optional_peer_missing · module resolution
Could not find package 'preact-render-to-string' from referrer 'file:///workspace/node_modules/preact/compat/server.mjs'.

Evidence JSON

Deno 2.9.7 · Subpaths · CommonJS requireInconclusive

12 passed · 2 need optional peers · 14 observed of 14 planned

Missing optional peers explain 2 of 2 recorded failed load attempts.

optional_peer_missing · module resolution
renderToString() error: missing "preact-render-to-string" dependency.

Evidence JSON

Planner omissions

pattern: 0
non executable: 7
not exported: 0
invalid subpath: 0
coverage limit: 0

./package.json — non executable
./compat/package.json — non executable
./debug/package.json — non executable
./devtools/package.json — non executable
./hooks/package.json — non executable
./test-utils/package.json — non executable
./jsx-runtime/package.json — non executable

Reproduce these inputs

Download the recorded inputs and exact dependency lock. These files do not include the CLI, runtime images or installed packages.

Reproduction inputs Exact package lock

Local replay requires setup. The CLI currently runs from the CompatLab source repository on a qualified Linux amd64/runsc host. Hosted runtime images are not yet distributed for public download; an operator must supply the exact images named in this report. A fresh image build does not substitute for them. CLI setup and replay requirements

Command for a configured host

Run from the built CompatLab repository with both downloads in that directory and the exact runtime images loaded. Rebuilding creates a new snapshot generation.

sudo "$(command -v node)" apps/cli/dist/bin.js reproduce ./4ea4cfc4-c1e2-491f-a591-3d1aaf3145dd-reproduction.json --rebuild --lockfile ./package-lock.json --json

The original worker last reported its sealed snapshot as available. Verified reuse requires those actual bytes in your local state directory.

Exact provenance

artifact: preact@11.0.0
integrity: sha512-LRTLKuSe6VYPhvBDjwFaX+nuZnpsw6IN2GSboisAvhGsncylBmrbDCERhgKDn6yP2mAwbGvsB5OVyTe33M8gBg==
tarball: https://registry.npmjs.org/preact/-/preact-11.0.0.tgz
snapshot: 5adfc437-031f-4443-8cd1-fa6ea475a4b1
generation: 033a249b-b4c1-4bad-9b4e-dcb586d88652
lockDigest: ed87c621cac1befd6cfc9982e7ceb7c9ddc881a3b5e08aa44dface3201ed96c1
treeDigest: 6112a50f6235ed2b38d7d0fa09ac040cc4d5d95cecc45c820a9379690caf0a71
installerImage: node:24.21.0-bookworm-slim@sha256:5cbc7caba8c2c0f0bca675d1b61b9f2857e1cf1853c6164ee9dd409501a936e7
preparationProfile: npm_11_19_0_linux_amd64_v2
harness: load_v2
planner: explicit_exports_v1
policy: runtime_limits_v2
classifier: classifier_v2
classifiedAt: 2026-10-09T06:03:31.861Z

node_24_21_0

sha256:780e803cd17524cd7672c0affdd0c646e9b519c53266f5ae9018ab3b31f83fb3

Built 2026-10-04 15:20 UTC · runtime_image_v1

node_26_10_0

sha256:6f8b23272379925b25c19f9225ce8ef83776d99dea34a0e43451ac3f96204323

Built 2026-10-04 15:20 UTC · runtime_image_v1

bun_1_4_2

sha256:24f5ff9755b8dbebafba484dc621d9159ff70c237902cd1fc889ec337c6ad8c9

Built 2026-10-04 15:21 UTC · runtime_image_v1

deno_2_9_7

sha256:8947185bb06b0d2aded69f46ac1638e862bdbe80a760600efbfd17d2feadfd1a

Built 2026-10-04 15:21 UTC · runtime_image_v1

Evidence limitations

Only installation and loading were observed; functional correctness and package safety are not established.
Subpath batches share module caches and globals; root modes use separate fresh sandboxes.
Package-visible harness observations can be tampered with. They are not adversarial attestation.
Evidence applies to these exact artifacts, dependency snapshot, runtime images and Linux amd64/glibc policy.
Runtime error codes are captured observations and can also be thrown by package code.