Javascript - Get query string from a string?

Question

I'm trying to get the query string from a string (not the current URL).

For example, I have a URL 'www.google.com/?query=string', I'd like to be able to run a function on it and get '?query=string' back from it. How would I go about doing this?

Thanks

• Roatin Marth: Do you need to parse the query string also? Eg to get an object with obj.query == 'string' back?
• Probocop: Hi, No i'm just after the full query string, it's for an SEO reporting tool I'm working on. I think Alsciende's answer is what I am after.

Answer 1

Well, you can use a quick regexp that gets you the part you need:

myString.match(/(\?.*)/)[1]

Example:

'www.google.com/?query=string'.match(/(\?.*)/)[1] // evaluates to '?query=string'

Answer 2

Window.location.search will evaluate to this.

http://www.w3schools.com/jsref/prop_loc_search.asp

Answer 3

There's a jQuery plugin for that.

• Alsciende: He said "not the current URL".
• Matt Ball: From what I've read in the documentation, you don't have to use the current URL. Maybe I read it wrong, or it's unclear, but this is what it says: "You can create a new query object based on a provided url through the load method," which sounds to me like you can pass in whatever string you want.

Answer 4

If you're using jQuery, use this plugin: http://projects.allmarkedup.com/jquery_url_parser/ This one lets you operate on the document's url, or any URL string

Then you can do:

$.url.setUrl("www.google.com/?query=string").attr("query") // returns 'query=string'

Or also get a specific parameter:

$.url.setUrl("www.google.com/?query=string").param("query") // returns 'string'

But if you really just need the whole query string, a quick regex like Alsciende suggested is the way to go.

• Probocop: Hi, Thanks for your response, It was indeed just the whole query string I wanted, but I'm sure I'll need this plugin at some point, so thank you.