regexp-sample

gistfile1.js

var uri = "http://localhost:8080/reinput?key=1234-5678-90ab-cdef";
var reg = /\\??key=[0-9a-f\\-]+/;
if (uri.match(reg)) {
  console.log("matched");
  var replaced = uri.replace(reg, "key=hoge");
  console.log(replaced);
} else {
  console.log("unmatched");
}