Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
varisString=require('is-string');varassert=require('assert');assert.notOk(isString(undefined));assert.notOk(isString(null));assert.notOk(isString(false));assert.notOk(isString(true));assert.notOk(isString(function(){}));assert.notOk(isString([]));assert.notOk(isString({}));assert.notOk(isString(/a/g));assert.notOk(isString(newRegExp('a','g')));assert.notOk(isString(newDate()));assert.notOk(isString(42));assert.notOk(isString(NaN));assert.notOk(isString(Infinity));assert.notOk(isString(newNumber(42)));assert.ok(isString('foo'));assert.ok(isString(Object('foo')));Simply clone the repo, npm install, and run npm test
