alert(i);//報(bào)錯(cuò),i未定義alert(i);var i = 0;//undefined
alert(i);結(jié)果會(huì)報(bào)錯(cuò),alert(i);var i = 0;結(jié)果是undefined
梵蒂岡之花
2018-09-14 14:09:01
