Typescript: How to write long regexp in 2 lines [duplicate]

Question

I use tslint and when I write long regexp in typescript

var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

I got error - exceeds maximum line length of 140.

Does anybody know how to write it in 2 lines. I can do that with a hack. But I'm not satisfied with this solution.

    var r1 = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))/;
    var r2 = /@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    var re = new RegExp(r1.source + r2.source);

Answer 1

Why not use strings?

var r1 = "^(([^<>()\[\]\\.,;:\s@\"]+(\.[^<>()\[\]\\.,;:\s@\"]+)*)|(\".+\"))";
var r2 = "@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$";
var re = new RegExp(r1 + r2);

RegExp(string) is easier for modification and/or dynamically generated regex