javascript 匹配域名之间的正则 .com.cn 和 .cn 和 .com 同时在

Question

有以下这些域名,需要获取加黑加粗的部分

http://www.nnn.cn/
http://meilishuo.com/
http://m.meilishuo.com.cn/
http://m.gome.com.cn
http://m.meilishuo.com/share/item_detail/3924101135?tab=0
http://product.m.dangdang.com/1181352912.html?
https://h5.m.taobao.com/guang/item.html?spm=a310p.7403370.19980966
http://item.jd.com/1903997.html
https://detail.m.tmall.com/item.htm?spm=a222m.7628550.0.0

Answer 1

https://github.com/oncletom/tld.js

<script src="//wzrd.in/standalone/tldjs">
<script>
tldjs.getDomain('mail.google.co.uk');
// -> 'google.co.uk'
</script>