Registry / serialization / babel-preset-es2015-nostrict

babel-preset-es2015-nostrict

library6.6.2jsnpmunverified

A Babel preset that includes all ES2015 plugins but suppresses the automatic insertion of 'use strict' at the top of compiled modules. This is useful for projects that need to avoid strict mode globally (e.g., when concatenating scripts or using non-strict dependencies). The preset mirrors babel-preset-es2015 (v6.6.2) but without the strict-mode directive. It was released in 2015-2016 as part of the Babel 6 ecosystem. This package is now obsolete; Babel 7+ deprecates presets like this in favor of @babel/preset-env with the 'modules' and 'config' options. Key differentiator: removes strict-mode enforcement for legacy code compatibility.

serialization

npm install babel-preset-es2015-nostrict

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · BABEL-PRESET-ES201

babel-preset-es2015-nostrict

serializationjavascriptv6.6.2

Install

—

Import

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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.

preset

✓ // In .babelrc: { "presets": ["es2015-nostrict"] }

✗ // Wrong: require('babel-preset-es2015-nostrict') directly without using the preset string

This preset is not imported as a JavaScript module; it is referenced by name in Babel configuration.

babel-preset-es2015-nostrict

✓ require('babel-preset-es2015-nostrict')

✗ var preset = require('babel-preset-es2015-nostrict').default;

Avoid using .default; the module exports the preset function directly.

babel-core (transform API)

✓ require('babel-core').transform(code, { presets: ['es2015-nostrict'] })

✗ require('babel-core').transform(code, { presets: [require('babel-preset-es2015-nostrict')] })

Refer to the preset by string name, not by requiring it directly in the presets array.

Shows installation, configuration via .babelrc, and demonstrates that strict mode is omitted in output.

// 1. Install: // npm install --save-dev babel-preset-es2015-nostrict babel-cli // 2. .babelrc { "presets": ["es2015-nostrict"] } // 3. Run: // babel script.js --out-file compiled.js // Example input (ES2015): const greet = name => `Hello, ${name}!`; // Output (no 'use strict'): var greet = function greet(name) { return 'Hello, ' + name + '!'; };

Debug

Known issues

deprecatedbabel-preset-es2015-nostrict is deprecated in favor of using @babel/preset-env with the 'modules' option and appropriate config.

fix

Migrate to Babel 7+ and use @babel/preset-env. To disable strict mode, set 'modules' to 'false' or use 'loose' transforms.

affects: >=6.0.0

breakingThe preset does not include any polyfills; it only transforms syntax. You may need babel-polyfill for runtime features like Promise or Symbol.

fix

Add babel-polyfill as a separate import or use @babel/preset-env with useBuiltIns.

affects: all

gotchaWithout 'use strict', code may run in sloppy mode, which can expose differences in behavior (e.g., with this binding, reserved words).

fix

If you need strict mode in some files, consider splitting your build process or using the standard babel-preset-es2015.

affects: all

Errors

Common errors & fixes

Error: Cannot find module 'babel-preset-es2015-nostrict'

The preset is not installed as a devDependency.

fix

Run 'npm install --save-dev babel-preset-es2015-nostrict'

SyntaxError: Unexpected token import

Babel is not configured to transform ES2015 modules, or the preset is not applied correctly.

fix

Ensure .babelrc contains { "presets": ["es2015-nostrict"] } and that babel-cli or babel-register is used.

Upgrade

Version history

6.6.2latest on npm

Audit

Dependencies

babel-preset-es2015requiredThis preset modifies the standard es2015 preset by removing the 'use strict' insertion.

Agent activity

12 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/alexykot/babel ↗

packagehttps://www.npmjs.com/package/babel-preset-es2015-nostrict ↗

homepagehttps://babeljs.io/ ↗