Does ECMAScript 2015(ECMAScript 6) have class initializer?

Question

I've looked in ECMAScript 2015 recently.
Does ECMAScript 2015 have class initializer?

For example, I tried to write class like a parser;

class URLParser {
    parse(url) {
        let regex = /(https?):\/\/([^\/]+)\/([^\?]*)\?([^#]*)#(.*)/;
        (....)
    }
}

var a = new URLParser();
a.parse('http://example.com/abc');
a.parse('http://example.com/def');
var b = new URLParser();
b.parse('https://sample.net/abc');
b.parse('https://sample.net/def');

This regex is common in class, so I'd like to initialize it only once.
I know to use constructor for reduction of initializing, but affects instance wide.
I'd like to know how to reduct initializing class wide.

Thank you.

Answer 1

Nope. There is a proposal for static properties though.

Until then, as always, you can add shared properties to the prototype:

URLParser.prototype.regex = /(https?):\/\/([^\/]+)\/([^\?]*)\?([^#]*)#(.*)/;

and access it inside your method via this.regex.