Registry / serialization / babel-preset-const-enum

babel-preset-const-enum

library1.0.0jsnpmunverified

Babel preset for transforming TypeScript const enums. Version 1.0.0. It runs babel-plugin-const-enum only on .ts/.tsx files to prevent syntax errors on non-TypeScript files. Provides two transform options: removeConst (default) reverts const enum to regular enum, while constObject inlines values into a const object literal for minification. Must be placed after @babel/preset-typescript in the preset order to work correctly. Lightweight, focused solution for using const enums with Babel.

serialization

npm install babel-preset-const-enum

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-PRESET-CONST

babel-preset-const-enum

serializationjavascriptv1.0.0

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 export (preset)

✓ module.exports = require('babel-preset-const-enum')

✗ import preset from 'babel-preset-const-enum'

Preset is CommonJS; use require in .babelrc or Babel config file.

Preset options

✓ presets: [['const-enum', { transform: 'constObject' }]]

✗ presets: [['babel-preset-const-enum', { transform: 'constObject' }]]

Short name 'const-enum' is recommended in preset array, but full name also works.

Plugin (babel-plugin-const-enum) - not typically imported directly

✓ not applicable

✗ import babelPluginConstEnum from 'babel-plugin-const-enum'

Use the preset instead; plugin may cause errors on non-TS files.

Shows how to configure babel-preset-const-enum with @babel/preset-typescript and constObject transform, then run Babel on a .ts file.

// .babelrc { "presets": [ "@babel/preset-typescript", ["const-enum", { "transform": "constObject" }] ] } // example.ts const enum Color { Red = 1, Green = 2, Blue = 3 } console.log(Color.Red); // Run: npx babel example.ts --out-file example.js // Output: // const Color = { // Red: 1, // Green: 2, // Blue: 3 // }; // console.log(Color.Red);

Debug

Known issues

gotchaPreset ordering: babel-preset-const-enum must come AFTER @babel/preset-typescript in the presets array.

fix

Put 'const-enum' after '@babel/preset-typescript' in the preset order.

affects: all

gotchaTransform 'removeConst' only removes const keyword, does not inline values. May not achieve full minification.

fix

Use transform: 'constObject' if you want inlined values for minification.

affects: all

deprecatedThe default transform 'removeConst' may not be optimal for production; consider using 'constObject' to fully leverage Uglify/Terser.

fix

Set transform: 'constObject' explicitly for production builds.

affects: <=1.0.0

Errors

Common errors & fixes

SyntaxError: Unexpected token, expected ";" (1:14) ... while parsing unexpected token

babel-preset-const-enum ran before TypeScript preset, causing parsing failure on const enum syntax.

fix

Reorder presets: put '@babel/preset-typescript' first, then 'const-enum'.

Error: Cannot find module 'babel-preset-const-enum'

Package not installed or not in node_modules.

fix

Install: npm install --save-dev babel-preset-const-enum

ReferenceError: MyEnum is not defined

Using transform: 'removeConst' and the enum is used before declaration (hoisting issue).

fix

Use transform: 'constObject' to create a const object that avoids hoisting issues.

Upgrade

Version history

1.0.0latest on npm

Audit

Dependencies

@babel/corerequiredpeer dependency required for Babel plugin functionality

Agent activity

14 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/dosentmatter/babel-preset-const-enum ↗

packagehttps://www.npmjs.com/package/babel-preset-const-enum ↗