How to retrieve query string parameter and values using javascript (Jquery)?

Question

Click me

$('.clickme').click(function(event) {
event.preventDefault();
var stringId = $(this).attr("id");
    var mId = stringId.substring(2)
....

I can retrieve the value of id using ID of anchor element. I think I should be able to get it directly from href. So how do I retrieve value of id and status from HREF (url query string)?

I am using Jquery.

Thank you for your help.

UPDATE: Also how do I can get all of the URL value .. i.e. "test.php?id=100&blah=blah"?

Answer 1

This code:

function querySt(ji) {
    hu = $(".clickme").attr("href");
    gy = hu.split("&");
    for (i=0;i<gy.length;i++) {
        ft = gy[i].split("=");
        if (ft[0] == ji) {
            return ft[1];
        }
    }
}

To use it:

document.write(querySt("id"));
document.write(querySt("status"));

Answer to your 'update':

http://ilovethecode.com/Javascript/Javascript-Tutorials-How_To-Easy/Get_Query_String_Using_Javascript.shtml

Answer 2

var stringId = $(this).attr("id"); // this will return p_100
var stringId = $(this).attr("id").split('_')[1]; // this will return 100

var attr= $(this).attr("href"); // this will return all href attribute value

UPDATE

//href="test.php?id=100&status=pending&time=2009"
var attrFromAnchor= $(this).attr("href").split('?')[1].split('&')[0].split('=')[1]; // returns 100

Answer 3

There are a lot of good solutions here but I figured I'd post my own. Here's a quick little function I threw together which will parse a query string in the format from either window.location.search or from a provided search string value;

It returns a hash of id value pairs so you could reference it in the form of:

var values = getQueryParams();
values['id']
values['blah']

Here's the code:

/*
 This function assumes that the query string provided will
 contain a ? character before the query string itself.
 It will not work if the ? is not present.

 In addition, sites which don't use ? to delimit the start of the query string
 (ie. Google) won't work properly with this script.
 */
function getQueryParams( val ) {
    //Use the window.location.search if we don't have a val.
    var query = val || window.location.search;
    query = query.split('?')[1]
    var pairs = query.split('&');
    var retval = {};
    var check = [];
    for( var i = 0; i < pairs.length; i++ ) {
        check = pairs[i].split('=');
        retval[decodeURIComponent(check[0])] = decodeURIComponent(check[1]);
    }

    return retval;
}

To get the value of the query string from the URL without string parsing you can do:

window.location.search.substr(1)

If you want the name of the page before the ? you still need to do a little string parsing:

var path = window.location.pathname.replace(/^.*\/(.*)$/,'$1');
var query = path + window.location.search;
//If your URL is http://www.myserver.com/some/long/path/big_long%20file.php?some=file&equals=me
//you will get: big_long%20file.php?some=file&equals=me

Hope this helps! Cheers.

Answer 4

No need for jQuery, this solution works on all browsers:

function querySt(ji)
{
    hu = window.location.search.substring(1);
    gy = hu.split("&");
    for (i=0;i<gy.length;i++) {
    ft = gy[i].split("=");
    if (ft[0] == ji) {
    return ft[1];
    }
    }
    return "";
}

Answer 5

Here's a concise (yet complete) implementation for getting ALL name/value pairs from a query string:

function getQueryParams(qs) {
    qs = qs.split("+").join(" ");
    var params = {};
    var tokens;

    while (tokens = /[?&]?([^=]+)=([^&]*)/g.exec(qs)) {
        params[decodeURIComponent(tokens[1])]
            = decodeURIComponent(tokens[2]);
    }

    return params;
}

//var query = getQueryParams(document.location.search);
//alert(query.foo);

Answer 6

Answers here are outdated now.

See this solution using Vanilla JavaScript (ES5)

var qd = {}; // qd stands for query dict
document.getElementById("p_100")[0].href.split("?")[1].split("&").forEach(function(item) {var k = item.split("=")[0], v = decodeURIComponent(item.split("=")[1]); (k in qd) ? qd[k].push(v) : qd[k] = [v,]})

I like to pretend it's oneliner, but I was told it's not. hmm...Who would split chained function calls on new lines anyways, right?

example:

"test.php?id=100&status=pending&time=2009"
> qd
id: ["100"]
status: ["pending"]
time: ["2009"]

// values can also be obtained like this
> qd.id[0]    // "100"
> qd["id"][0] // "100"

*It returns arrays, because it is optimized for multi-valued keys. Look here for dummy solutions (without arrays).

note: To teach old browsers the new .forEach you can inject this polyfill from Mozilla (MDN).