last word no dot before that

console.log("Hello World!");

 let strs = ["/hello/world","hello/world.html","http://www.baidu.com"]
 strs.map(v => console.log(v," => ",search(v)));
 
 function search(v){
     let ret = v.match(/\.?\w+$/i);
	 if(ret[0][0] == "."){
	     ret = v.replace(/\.\w+$/i,"")
	     ret = search(ret);
	     return ret
	 }else{
	     return ret[0];
	 }
 }