#es-abstract

ECMAScript spec abstract operations. When different versions of the spec conflict, the default export will be the latest version of the abstract operation. All abstract operations will also be available under an es5/es6/es7 exported property if you require a specific version.

var ES = require('es-abstract');
var assert = require('assert');

assert(ES.isCallable(function () {}));
assert(!ES.isCallable(/a/g));

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