Create versions of strings where characters that match a regular expression are percent encoded.
var pctEncode = require("pct-encode");
var encode = pctEncode(/\W/g);
console.log(encode("UTF-8 in your URIs: ✓")); // UTF-8%20in%20your%20URIs%3A%20%E2%9C%93
Given a regular expression, this returns a function that takes a string and
returns a copy with characters that match regexp
percent-encoded.