<script>console.log(javascript, regular expression');</script>

摘要： 1、变量看下面一段代码var t = "global";function test() {a = "global too";var t = "local";alert(t); //output:"local"alert(a); //output:"global too"t = "also local";}test();alert(t); //output:"global"alert(a); //output:"global too"为什 阅读全文