has-private-fields

Determine if the JS environment has private fields (class { #x; }) support.

Example

const assert = require('assert');
const hasPrivateFields = require('has-private-fields');

assert.equal(hasPrivateFields(), true); // if the environment has native class private fields support (node v12+)

const { hasPrivateAccessors, hasPrivateMethods } = hasPrivateFields;

assert.equal(hasPrivateAccessors(), true); // if the environment has native class private accessors support (node v14.6+)
assert.equal(hasPrivateMethods(), true); // if the environment has native class private methods support (node v14.6+)

Tests

Simply clone the repo, npm install, and run npm test