Retrieve number from string via JS regex

Question

I'm trying to retrieve a certain number from a string. But i can't figure out how to isolate the part i need.

The string:

https://intra.site.com/departments/travel/Lists/Booking/fd_Item_Display.aspx?List=8af14ed7-3bde-4ec0-b62a-9516324c967e&ID=15&Source=https%3A%2F%2Fintra%2Emonjasa%2Ecom%2Fdepartments%2Ftravel%2FPages%2Fdefault%2Easpx&ContentTypeId=0x0100B7DC1AFF519B6343BC8014EB1910DFAB

I need the number after ID=.

I did try to use string.replace() without luck.

How could I do this with regex?

Qarib Haider · Accepted Answer · 2014-12-10 08:02:00Z

3

Check this out :

function getParameterByName(url, parameter) {
   var regex = new RegExp("[\\?&]" + parameter + "=([^&#]*)"),
   results = regex.exec(url);
   return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}

var url = 'https://intra.site.com/departments/travel/Lists/Booking/fd_Item_Display.aspx?List=8af14ed7-3bde-4ec0-b62a-9516324c967e&ID=15&Source=https%3A%2F%2Fintra%2Emonjasa%2Ecom%2Fdepartments%2Ftravel%2FPages%2Fdefault%2Easpx&ContentTypeId=0x0100B7DC1AFF519B6343BC8014EB1910DFAB';
var parameter = 'ID';

console.log( getParameterByName(url, parameter) );
// Log => 15

answered Dec 10, 2014 at 8:02

Qarib Haider

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anubhava · Accepted Answer · 2014-12-10 07:58:33Z

1

You can use:

var str = 'https://intra.site.com/departments/travel/Lists/Booking/fd_Item_Display.aspx?List=8af14ed7-3bde-4ec0-b62a-9516324c967e&ID=15&Source=https%3A%2F%2Fintra%2Emonjasa%2Ecom%2Fdepartments%2Ftravel%2FPages%2Fdefault%2Easpx&ContentTypeId=0x0100B7DC1AFF519B6343BC8014EB1910DFAB';
var id = (str.match(/&ID=([^&]*)/i) || ['', ''])[1];
//=> 15

answered Dec 10, 2014 at 7:58

anubhava

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1 Comment

TietjeDK Over a year ago

Thx m8 - this works perfectly. I will mark as correct answer in 10 min.

Emre Acar · Accepted Answer · 2014-12-10 08:23:30Z

1

Try this. Easier to understand.

    

    function getID()
    {
      
    var str = "https://intra.site.com/departments/travel/Lists/Booking/fd_Item_Display.aspx?List=8af14ed7-3bde-4ec0-b62a-9516324c967e&ID=15&Source=https%3A%2F%2Fintra%2Emonjasa%2Ecom%2Fdepartments%2Ftravel%2FPages%2Fdefault%2Easpx&ContentTypeId=0x0100B7DC1AFF519B6343BC8014EB1910DFAB";

    var id = str.match(/ID=(\d*)/)[1];        
     
    alert(id);
      
    }

<input type="button" onclick="getID()" value="Click me">

edited Dec 10, 2014 at 8:23

answered Dec 10, 2014 at 8:09

Emre Acar

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