Babel Preset Taskcluster

3.0.0 verified Sat Apr 25 auth: no javascript maintenance

A Babel preset that transforms Taskcluster ES6+ code into backwards-compatible JavaScript for Node.js environments. The current stable version is 3.0.0. This package is part of the Taskcluster ecosystem and provides a standardized Babel configuration for Taskcluster projects. It is designed to target older Node.js versions (including Node 4) and includes common transforms like ES6 module syntax, arrow functions, and other modern JavaScript features. It is maintenance-focused and not actively updated for newer Babel versions or Node.js releases.

Common errors

error Cannot find module 'babel-preset-taskcluster' ↓

cause Preset not installed or incorrect version.

fix

Run npm install --save-dev babel-preset-taskcluster.

error Error: Plugin/Preset files are not allowed to export objects, only functions. ↓

cause Using require() to import the preset instead of the preset name string.

fix

Use the preset name as a string, e.g., presets: ['babel-preset-taskcluster'].

Warnings

deprecated This preset targets very old Node.js versions (Node 4). For modern Node.js >=10, consider using @babel/preset-env instead. ↓

fix Switch to @babel/preset-env with target 'node: current' or specific Node versions.

gotcha The preset is designed specifically for Taskcluster projects. Using it outside that context may include unnecessary transforms. ↓

fix Evaluate if Taskcluster-specific transforms are needed for your project.

gotcha This preset does not include polyfills. You must provide your own polyfills for features like Promises, Object.assign, etc. ↓

fix Use core-js or @babel/polyfill (deprecated) in conjunction with this preset.

Install

npm install babel-preset-taskcluster

yarn add babel-preset-taskcluster

pnpm add babel-preset-taskcluster

Imports

presets
wrong
```
import presets from 'babel-preset-taskcluster'
```
correct
```
module.exports = { presets: ['babel-preset-taskcluster'] }
```
This is a Babel preset, not a regular library. Use in .babelrc or babel.config.js as a preset string.

default

wrong

require('babel-preset-taskcluster')

correct

module.exports = { presets: ['babel-preset-taskcluster'] }

In Babel config, presets are referenced by package name directly.

babel-preset-taskcluster
wrong
```
{ presets: [require('babel-preset-taskcluster')] }
```
correct
```
module.exports = { presets: ['babel-preset-taskcluster'] }
```
In Babel configuration files, you use the string name of the preset, not the required module.

Quickstart

How to configure Babel to use the Taskcluster preset in a project.

// In babel.config.js
module.exports = {
  presets: ['babel-preset-taskcluster']
};