Name: tessl/npm-cjs-module-lexer
Rating: 0.93 (1 reviews)
Author: tessl

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tessl/npm-cjs-module-lexer

High-performance CommonJS module lexer for detecting named exports and reexports from JavaScript source code

0.98x

Quality

Pending

Does it follow best practices?

Impact

93%

0.98x

Average score across 10 eval scenarios

Overview

Eval results

Files

Evaluation results

97%

Module Export Analyzer

Token parsing (strings, comments, templates, regex)

Criteria

Without context

With context

Package import

100%

parse() invocation

100%

Exports array usage

100%

Reexports array usage

100%

Proper initialization

40%

92%

-8%

CommonJS Export Analyzer

Basic export detection (exports.name, module.exports)

Criteria

Without context

With context

Import package

100%

Call parse function

100%

Handle initialization

100%

46%

Extract exports array

100%

Extract reexports array

100%

Return correct format

100%

CommonJS Export Analyzer

Object.defineProperty getter and value detection

Criteria

Without context

With context

Import parse function

100%

Call parse function

100%

Extract exports array

100%

Value property detection

100%

Getter property detection

100%

Multiple exports handling

100%

Module Export Batch Analyzer

Performance optimizations (memory management, endian handling)

Criteria

Without context

With context

Imports cjs-module-lexer

100%

Calls init()

100%

Uses parse() function

100%

Extracts exports array

100%

Extracts reexports array

100%

Handles parse errors

100%

73%

JavaScript Identifier Validator

Grammar validation (ECMA-262 identifiers, surrogate pairs)

Criteria

Without context

With context

Uses parse function

80%

100%

Extracts exports correctly

100%

Handles Unicode identifiers

50%

Validates surrogate pairs

50%

Filters reserved words

33%

53%

100%

CommonJS Module Reexport Analyzer

Module reexport detection (module.exports = require())

Criteria

Without context

With context

Imports parse function

100%

Calls parse correctly

100%

Extracts reexports field

100%

Returns reexports array

100%

70%

-25%

Module Export Analyzer

Star re-export pattern detection (__export, __exportStar)

Criteria

Without context

With context

Uses parse function

100%

Extracts reexports data

100%

60%

Returns module list

75%

50%

Detects presence flag

100%

50%

Handles empty case

100%

CommonJS Module Analyzer

Parse function with exports and reexports extraction

Criteria

Without context

With context

Import package

100%

Call init()

100%

Use parse() function

100%

Extract exports array

100%

Extract reexports array

100%

Handle errors

100%

20%

Transpiler Export Pattern Analyzer

Transpiler-specific Object.keys().forEach() patterns

Criteria

Without context

With context

Imports parse function

100%

Calls parse function

100%

Accesses exports array

100%

Handles reexports array

100%

Detects Babel pattern

33%

100%

Identifies source module

33%

100%

Handles arrow functions

100%

Negative case handling

100%

Transpiled Module Analyzer

TypeScript transpiler pattern recognition

Criteria

Without context

With context

Uses parse function

100%

Analyzes source code

100%

Detects Babel patterns

100%

Detects TypeScript patterns

100%

Returns correct format

100%

Install with Tessl CLI

npx tessl i tessl/npm-cjs-module-lexer

Evaluated: 2 months ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Module Export Analyzer CommonJS Export Analyzer CommonJS Export Analyzer Module Export Batch Analyzer JavaScript Identifier Validator CommonJS Module Reexport Analyzer Module Export Analyzer CommonJS Module Analyzer Transpiler Export Pattern Analyzer Transpiled Module Analyzer