es-identifiers

Regular expressions of ECMAScript's (Unicode-based) IdentifierName production (per latest available Unicode version, currently 10.0.0).

Node usage

const {IdentifierName} = require('es-identifiers');
IdentifierName.test(aPurportedIdentifier);

Browser usage

<script src="node_modules/es-identifiers/dist/es-identifiers-browser.js">

ESIdentifiers.IdentifierName.test(aPurportedIdentifier);