Typescript: How to write long regexp in 2 lines

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);

Also check [Casimir's comment](http://stackoverflow.com/questions/35561010/angular-internet-routable-email-address-validation#comment58811760_35561678) regarding a similar email validation regex. — Wiktor Stribiżew, Feb 24 '16 at 12:01
I use angular2-seed boilerplate app. And tslint settings are pre-set there. — radzserg, Feb 24 '16 at 12:36
Yes this is duplicate [How to split a long regular expression into multiple lines in JavaScript?](http://stackoverflow.com/questions/12317049/how-to-split-a-long-regular-expression-into-multiple-lines-in-javascript) Still I hoped that more elegant solution exists — radzserg, Feb 24 '16 at 12:40

score 3 · Answer 1 · answered Feb 24 '16 at 11:03

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

Typescript: How to write long regexp in 2 lines

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