Javascript regex match using RegExp

Question

I am trying below code to get the output 1. But not able to get it.

var labhost = '0';
var podmaster_node = "evhlab65.ms.com";
var matchtxt = new RegExp('\w+\.ms\.com', "i");


if (podmaster_node.match(matchtxt)) {
    labhost = '1';
}

alert(labhost);

Please help me on this.

Thanks!

What exactly should the regex match?

Cerbrus
– Cerbrus

2014-11-04 08:08:50 +00:00
Commented Nov 4, 2014 at 8:08 — Cerbrus
– Cerbrus, Commented Nov 4, 2014 at 8:08

thefourtheye · Accepted Answer · 2014-11-04 08:13:54Z

2

When you are escaping Regular Expression in RegExp constructor, you need to escape like this

var matchtxt = new RegExp('\\w+\\.ms\\.com', "i");

\w+, translates to w+. So you need to escape \ with \\, which makes \ as part of the regular expression.

var labhost = '0';
var podmaster_node = "evhlab65.ms.com";
var matchtxt = new RegExp('\\w+\\.ms\\.com', "i");


if (podmaster_node.match(matchtxt)) {
  labhost = '1';
}

document.getElementById("result").innerHTML = labhost;

<div id="result" />

Note: The better way to do this would be to use Regular Expression literal, like this

var matchtxt = /\w+\.ms\.com/i;

edited Nov 4, 2014 at 8:13

answered Nov 4, 2014 at 8:08

thefourtheye

241k53 gold badges466 silver badges505 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Javascript regex match using RegExp

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related