import tagTester from './_tagTester.js'; import { root } from './_setup.js'; var isFunction = tagTester('Function');
Optimize isFunction if appropriate. Work around some typeof bugs in old
v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
var nodelist = root.document && root.document.childNodes; if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') { isFunction = function(obj) { return typeof obj == 'function' || false; }; } export default isFunction;