start-babel

library3.0.0jsnpmunverified

Babel task for the Start task runner. Current stable version is 3.0.0 (released 2017-01-07). It integrates Babel transpilation into Start pipelines, supporting SourceMaps and configurable Babel options. Key differentiator: it operates on `[{ path, data, map }]` streams, making it compatible with Start's file-based flow. For newer Node versions, Babel 7+, or non-Start setups, consider using core Babel APIs or other runners like Gulp or Webpack.

devops

npm install start-babel

github ↗package ↗

INSTALL

IMPORT

SIG · START-BABEL

start-babel

devopsjavascriptv3.0.0

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

✓ import babel from 'start-babel'

✗ const babel = require('start-babel')

ESM-only since v3.0.0; CommonJS require may fail depending on Node version and transpilation.

babel

✓ import babel from 'start-babel'

✗ import { babel } from 'start-babel'

Default export only; named export does not exist.

babel

✓ import * as startBabel from 'start-babel'; startBabel.default(options)

✗ import * as startBabel from 'start-babel'; startBabel(options)

Namespace import requires calling .default; direct call without .default will fail.

Shows a basic build pipeline using start-babel: clean target, read source files, transpile with source maps, write output.

import Start from 'start'; import reporter from 'start-pretty-reporter'; import files from 'start-files'; import clean from 'start-clean'; import read from 'start-read'; import babel from 'start-babel'; import write from 'start-write'; const start = Start(reporter()); export const build = () => start( files('build/'), clean(), files('src/**/*.js'), read(), babel({ sourceMaps: true }), write('build/') );

Debug

Known issues

breakingInput data format changed in v2.0.0: now expects `[{ path, data, map }]` instead of raw file buffers.

fix

Ensure upstream tasks (e.g., start-read) provide objects with `path`, `data`, `map` properties.

affects: >=2.0.0

breakingDropped Node < 4 in v3.0.0; also switched to `babel-preset-start` and removed `babel-runtime` dependency.

fix

Use Node >= 4. If you need babel-runtime, add it as a direct dependency.

affects: >=3.0.0

deprecatedThis package is not actively maintained; last release was 2017. Babel 7+ and new Start versions may cause incompatibility.

fix

Consider migrating to direct Babel usage or an actively maintained build tool.

affects: >=3.0.0

gotchaESM-only since v3.0.0; CommonJS require may fail if not transpiled or if Node version lacks ESM support.

fix

Use ES module import syntax, or use a bundler/transpiler that understands ESM.

affects: >=3.0.0

gotchaDefault Babel options set `{ ast: false }`. If you need AST in output, you must explicitly override.

fix

Pass `ast: true` in the options object to babel() if you require the AST.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'start'

start (task runner) is required as a peer dependency and not installed.

fix

Install start: npm install --save-dev start

TypeError: (0 , _startBabel.default) is not a function

Using named import `import { babel }` instead of default import.

fix

Use `import babel from 'start-babel'` instead of `import { babel }`.

TypeError: startBabel is not a function

Namespace import used without calling `.default`.

fix

Use `import babel from 'start-babel'` or call `startBabel.default(options)`.

Error: Input data must be an array of objects with { path, data, map }

Using an older task (e.g., start-read prior to v2) that emits raw buffers.

fix

Update all tasks to versions that emit the required object format, or patch the data.

Error: unknown: Unexpected token (1:0)

Babel cannot parse the file; often due to missing Babel presets/plugins.

fix

Install and configure Babel presets (e.g., babel-preset-env) in a .babelrc or babel.config.js.

Upgrade

Version history

3.0.0latest on npm

Audit

Dependencies

startrequiredStart task runner is a peer dependency; start-babel requires it to run.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/start-runner/babel ↗

packagehttps://www.npmjs.com/package/start-babel ↗