Registry / http-networking / ast-walker-scope

ast-walker-scope

library0.9.0jsnpmunverified

Traverse Babel AST with scope information. v0.9.0 is the current stable version, released with breaking changes dropping the types field and fixing a prototype pollution vulnerability. The package is ESM-only from v0.8.0, requires Node >=20.19.0, and builds on top of estree-walker. Key differentiators: scope tracking per node, support for Babel AST, and a simple hook context with scope, scopes, and level properties. Compared to estree-walker, it adds scope-aware traversal without a separate scope analysis step.

http-networking

npm install ast-walker-scope

github ↗package ↗

INSTALL

IMPORT

SIG · AST-WALKER-SCOPE

ast-walker-scope

http-networkingjavascriptv0.9.0

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.

walk

✓ import { walk } from 'ast-walker-scope'

✗ const walk = require('ast-walker-scope')

ESM-only since v0.8.0; no CommonJS export. Use dynamic import() if needed.

Scope

✓ import type { Scope } from 'ast-walker-scope'

✗ import { Scope } from 'ast-walker-scope'

Scope is a TypeScript type, not a value. Use `import type` for type-only imports.

HookContext

✓ import type { HookContext } from 'ast-walker-scope'

✗ import { HookContext } from 'ast-walker-scope'

HookContext is a TypeScript type, not a runtime value. Must be imported as type.

Demonstrates basic usage of walk() with scope tracking in enter/leave hooks.

import { walk } from 'ast-walker-scope'; const code = ` const a = 1; { const b = 2; console.log(a, b); } `.trim(); walk(code, { enter(node) { console.log(`Enter: ${node.type}`); }, leave(node) { if (node.type === 'CallExpression') { console.log('Scope variables:', Object.keys(this.scope)); } }, });

Debug

Known issues

breakingRemoved types field from package.json; TypeScript types may not be resolvable without separate types export.

fix

Use `import type` and ensure your tsconfig includes `node_modules/ast-walker-scope` types correctly; or install `@types/ast-walker-scope` if available.

affects: >=0.9.0

breakingDropped CommonJS build and Node.js 18 support.

fix

Migrate to ESM syntax (`import` instead of `require`). Upgrade Node.js to >=20.19.0.

affects: >=0.8.0

breakingDropped Node.js 16 support.

fix

Upgrade Node.js to >=18 or later (but note >=0.8.0 requires >=20.19.0).

affects: >=0.7.0

breakingDefault to ESM from v0.6.0; CJS require() no longer works without dynamic import.

fix

Switch to `import` syntax or use dynamic `import('ast-walker-scope')`.

affects: >=0.6.0

deprecatedPrototype pollution via __proto__ identifier was fixed in v0.9.0.

fix

Upgrade to v0.9.0 or later to avoid potential prototype pollution.

affects: <0.9.0

Errors

Common errors & fixes

ERR_REQUIRE_ESM: require() of ES Module /path/to/node_modules/ast-walker-scope/dist/index.js from /path/to/project/index.js not supported.

Package is ESM-only from v0.8.0 (v0.6.0 if using default ESM).

fix

Replace `require('ast-walker-scope')` with `import { walk } from 'ast-walker-scope'` or use dynamic `import()`.

TypeError: walk is not a function

Incorrect import pattern (e.g., default import instead of named import).

fix

Use `import { walk } from 'ast-walker-scope'` (named import).

Module not found: Can't resolve 'ast-walker-scope' in '/path/to/project'

Package not installed or misspelled.

fix

Run `npm install ast-walker-scope` and ensure the import path is correct.

Upgrade

Version history

0.9.0latest on npm

Audit

Dependencies

@babel/typesrequiredUsed for Babel AST node type definitions and utilities.

Agent activity

19 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/sxzz/ast-walker-scope ↗

packagehttps://www.npmjs.com/package/ast-walker-scope ↗