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  • isFunction.js

  • ¶ 
    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;