试试这个：

var a = 'http://www.baidu.com/aaa.com'; var b = 'https://aaa.com/img/01.png'; var c = 'http://a.bbb.com/img/02.jpg'; var reg = /^https{0,1}:\/\/(aaa|bbb|ccc)\.com.*/; console.log(reg.test(a)); //false console.log(reg.test(b)); //true console.log(reg.test(c)); //false

/^(\w*:\/\/)?w*\.?(aaa|bbb|ccc)\.com/.test()

不含http时可以匹配

var str = location.protocol+location.hostname; var reg = new RegExp("/^https://www\.(aaa|bbb|ccc)\.com$/i"); var result = reg.test(str);

应该符合你的要求

可以看下http://www.bcodey.com/?p=639

/^https?://(aaa|bbb|ccc).com.*/