Behavior of Regex in javascript [duplicate]

Question

I am new to javascript and have not much idea about regular expressions. Please help me in understanding the following code.

var r = new RegExp("^.*?https://www\\.facebook\\.com/servlet/SignOn.*$","i");
var content = "https://www.facebook.com/servlet/SignOn?msg=You+are+not+authorized+to+vie…r+level+of+authority.&cm_sp=TopNav-_-servlet-_-MMM&goto=MembersMainMenu%3F";
console.log(content.search(r));// It gives me 0

But when I change the regex to

var r = new RegExp("^.*?https://www\\.facebook\\.com/servlet/SignOn?msg=.*$","i");
console.log(content.search(r));// It gives me -1 , why??

There is a star after . in the regex

wittyrandhir
– wittyrandhir

2016-12-15 11:49:57 +00:00
Commented Dec 15, 2016 at 11:49 — wittyrandhir
– wittyrandhir, Commented Dec 15, 2016 at 11:49

Fallenhero · Accepted Answer · 2016-12-15 11:51:18Z

0

n? means n is optional you need n\?

answered Dec 15, 2016 at 11:51

Fallenhero

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