README.md

core-features

Tells you whether a given feature is supported in a given version of Node.js, for versions of Node.js that are on active or maintenance release lines.

Usage

This module exports a function supports(feature[, version]). If version is omitted, then process.versions.node is used. Any semver-valid version number may be used, but only versions corresponding to actively maintained release lines are supported. Versions outside those ranges may result in incorrect output. The feature argument is a .-separated path that uniquely identifies a feature of Node.js.

Note: Not all features of Node.js are included, but going forward, all semver-minor feature additions and semver-major feature removals are expected to be reflected in data.yml. Please see the data.yml or use the list property to see what's supported.

In the event that data is missing for a feature, supports will return undefined, rather than a boolean.

The full list of available features to check support for is given as the exported list property.

Examples

const { supports, list } = require('core-features');

console.log(list);
// [ 'fs',
//   'fs.mkdir',
//   'fs.mkdir.recursive',
//   ... ]

console.log(supports('fs.mkdir.recursive', '10.8.0')); // false
console.log(supports('fs.mkdir.recursive', '10.8.0')); // false
console.log(supports('fs.mkdir.recursive', '10.9.0')); // true

console.log(supports('fs.mkdir.recursive')); // false (on Node v10.8.0)
console.log(supports('fs.mkdir.recursive')); // true (on Node v10.9.0)

console.log(supportS('fs.mkdir'); // true
console.log(supportS('fs'); // true

Contributing

See CONTRIBUTING.md.

License

MIT License. See LICENSE.