Registry / http-networking / deep-scope-analyser

deep-scope-analyser

library1.7.0jsnpmunverified

Webpack plugin (npm package deep-scope-analyser v1.7.0, low activity) that improves tree-shaking by performing deep scope analysis to eliminate unused imports and exports. Designed for webpack 4.14.0+ and Node.js 8+. It solves webpack issue #6264 by analyzing variable scopes to determine which imports can be safely removed, beyond what webpack's built-in tree-shaking achieves. The plugin works only with ES module syntax (import/export) and requires the PURE annotation for side-effect marking. Originally named webpack-deep-scope-plugin (v1.5.x), renamed to deep-scope-analyser in v1.6.0 for standalone use. Maintained by a GSoC 2018 student, but has seen no updates since 2019. Differentiators: deeper analysis than standard tree-shaking; but limited to webpack 4 and ESM-only, with potential compatibility issues.

http-networking web-framework devops

npm install deep-scope-analyser

github ↗package ↗

INSTALL

IMPORT

SIG · DEEP-SCOPE-ANALYSE

deep-scope-analyser

http-networkingjavascriptv1.7.0

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 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

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

default

✓ import WebpackDeepScopeAnalysisPlugin from 'webpack-deep-scope-plugin';

✗ import { WebpackDeepScopeAnalysisPlugin } from 'webpack-deep-scope-plugin';

Default export; the package ships TypeScript definitions.

default

✓ const WebpackDeepScopeAnalysisPlugin = require('webpack-deep-scope-plugin').default;

✗ const WebpackDeepScopeAnalysisPlugin = require('webpack-deep-scope-plugin');

CommonJS require must explicitly access .default because the package uses ESM-style default export.

default

✓ import WebpackDeepScopeAnalysisPlugin from 'deep-scope-analyser';

✗ import { default as WebpackDeepScopeAnalysisPlugin } from 'deep-scope-analyser';

Alternative package name deep-scope-analyser also works; same default import pattern.

Adds deep scope analysis plugin to a webpack 4 production config to improve tree-shaking.

// webpack.config.js const WebpackDeepScopeAnalysisPlugin = require('webpack-deep-scope-plugin').default; module.exports = { mode: 'production', entry: './src/index.js', output: { path: __dirname + '/dist', filename: 'bundle.js' }, plugins: [ new WebpackDeepScopeAnalysisPlugin() ] };

Debug

Known issues

breakingRenamed from webpack-deep-scope-plugin (v1.5.x) to deep-scope-analyser (v1.6.0). Existing import paths break.

fix

Use package deep-scope-analyser or continue using webpack-deep-scope-plugin (v1.5.4) for older webpack.

affects: >=1.6.0

deprecatedPackage has not been updated since 2019; may be incompatible with webpack 5 and modern Node.js (>=14).

fix

Consider alternatives like webpack's built-in sideEffects flag or optimization.usedExports for webpack 5+.

affects: >=1.7.0

gotchaThe plugin only works with ES module syntax (import/export). If Babel or TypeScript transpile to CommonJS (require/module.exports), the analysis fails silently.

fix

Ensure your code uses native ES modules; avoid using @babel/plugin-transform-modules-commonjs.

affects: all

gotchaCommonJS require('webpack-deep-scope-plugin') returns an empty object; must use .default property.

fix

Use const Plugin = require('webpack-deep-scope-plugin').default;

affects: >=1.6.0

Errors

Common errors & fixes

Module not found: Error: Can't resolve 'webpack-deep-scope-plugin'

Package was renamed to deep-scope-analyser in v1.6.0.

fix

npm install deep-scope-analyser (or pin version to 1.5.4) and update import to deep-scope-analyser.

TypeError: webpackDeepScopeAnalysisPlugin is not a constructor

Using CommonJS require without .default property.

fix

const WebpackDeepScopeAnalysisPlugin = require('webpack-deep-scope-plugin').default;

Error: Cannot find module 'webpack'

Missing webpack peer dependency.

fix

npm install webpack@4 --save-dev

Upgrade

Version history

1.7.0latest on npm

Audit

Dependencies

webpackrequiredCore dependency: the plugin integrates as a webpack plugin, requiring webpack >=4.14.0.

Agent activity

13 hits · last 30 days

node

Amazon

OpenAI (training)

Resources

githubhttps://github.com/vincentdchan/webpack-deep-scope-analysis-plugin ↗

packagehttps://www.npmjs.com/package/deep-scope-analyser ↗