// 面试题1 var name = 'World'; (function () { if (typeof name==='undefined') { var name = 'jack'; console.log('Good bye' + name) }else{ console.log('Hello' + name) } })(); //Good byejack 答对了,变量提升 var str = 'hi'; console.log('Value' + (str==='hi')?'somet…