adding object key and value to URL Query

adding object key and value to URL Query - javascript

I have a function which updates the URL query string. in some scenarios it works fine where i have single key and array of values but when i have multiple keys with array of values it doesn't append it to query string but if I see the object i can see the keys and its value. Following is my function
function Querystring(obj) {
var querystring = "";
// Build the query string
var currentQueryString = parseQueryString();
var newQueryString = "";
var dataCategory = Object.keys(obj)[0];
console.log(dataCategory);
// Set the new value
if (obj[dataCategory] != null) {
currentQueryString[dataCategory] = obj[dataCategory].join(",");
// Loop the keys in currentQueryString and contruct new querystring
Object.keys(currentQueryString).forEach(function (key, index) {
if (index == 0) {
newQueryString += "?" + key + "=" + currentQueryString[key];
} else {
newQueryString += "&" + key + "=" + currentQueryString[key];
}
});
}
var newurl = window.location.protocol + "//" + window.location.host + window.location.pathname + newQueryString;
window.history.pushState({ path: newurl }, '', newurl);
return newQueryString;
}
This is how i am calling this function
$('.select').change(function () {
var SortOrder = $(this).attr("id");
var SortBy = $(this).data("sortby");
var obj = {};
obj[SortOrder] = $(this).val();
obj[SortBy] = [$('option:selected', this).data("price")];
Querystring(obj);
});
Thanks in advance

You can simply this quite a bit. Try the example below. Ignore the getParser function as it is there just for us to be able to test this code.
function getParser(url) {
var a = document.createElement("a");
a.href = url;
return a;
}
function getUpdatedURL(url, newQueryParams) {
var searchParams = url.search.substring(1).split("&");
var obj = {};
searchParams.forEach(function(param){
var paramParts = param.split("=");
obj[paramParts[0]] = paramParts[1];
});
obj = Object.assign(obj, newQueryParams);
url.search = "?"+Object.keys(obj).map(p => p+"="+obj[p]).join("&");
return url.href;
}
var url = getParser("http://example.com/test/page?blah=abc&test=123");
//Ignore this as this is just for us to be able to test and run this example. You'll pass in the window.location instead of the url variable defined here.
console.log(getUpdatedURL(url, { sortOrder: "1345", sortBy: ["price","other","more"] }));

Writing code for it is quiet easy, but to get the full juices, i recommend using this tiny library:
https://www.npmjs.com/package/query-string
i wrote my own code to build and destruct a query string, but i switched to this one as it gives the full rainbow.
Usage
const queryString = require('query-string');
console.log(location.search);
//=> '?foo=bar'
const parsed = queryString.parse(location.search);
console.log(parsed);
//=> {foo: 'bar'}
console.log(location.hash);
//=> '#token=bada55cafe'
const parsedHash = queryString.parse(location.hash);
console.log(parsedHash);
//=> {token: 'bada55cafe'}
parsed.foo = 'unicorn';
parsed.ilike = 'pizza';
const stringified = queryString.stringify(parsed);
//=> 'foo=unicorn&ilike=pizza'
location.search = stringified;
// note that `location.search` automatically prepends a question mark
console.log(location.search);
//=> '?foo=unicorn&ilike=pizza'

Related

how to change url parameter value in browser [duplicate]

I have this URL:
site.fwx?position=1&archiveid=5000&columns=5&rows=20&sorting=ModifiedTimeAsc
what I need is to be able to change the 'rows' url param value to something i specify, lets say 10. And if the 'rows' doesn't exist, I need to add it to the end of the url and add the value i've already specified (10).

I've extended Sujoy's code to make up a function.
/**
* http://stackoverflow.com/a/10997390/11236
*/
function updateURLParameter(url, param, paramVal){
var newAdditionalURL = "";
var tempArray = url.split("?");
var baseURL = tempArray[0];
var additionalURL = tempArray[1];
var temp = "";
if (additionalURL) {
tempArray = additionalURL.split("&");
for (var i=0; i<tempArray.length; i++){
if(tempArray[i].split('=')[0] != param){
newAdditionalURL += temp + tempArray[i];
temp = "&";
}
}
}
var rows_txt = temp + "" + param + "=" + paramVal;
return baseURL + "?" + newAdditionalURL + rows_txt;
}
Function Calls:
var newURL = updateURLParameter(window.location.href, 'locId', 'newLoc');
newURL = updateURLParameter(newURL, 'resId', 'newResId');
window.history.replaceState('', '', updateURLParameter(window.location.href, "param", "value"));
Updated version that also take care of the anchors on the URL.
function updateURLParameter(url, param, paramVal)
{
var TheAnchor = null;
var newAdditionalURL = "";
var tempArray = url.split("?");
var baseURL = tempArray[0];
var additionalURL = tempArray[1];
var temp = "";
if (additionalURL)
{
var tmpAnchor = additionalURL.split("#");
var TheParams = tmpAnchor[0];
TheAnchor = tmpAnchor[1];
if(TheAnchor)
additionalURL = TheParams;
tempArray = additionalURL.split("&");
for (var i=0; i<tempArray.length; i++)
{
if(tempArray[i].split('=')[0] != param)
{
newAdditionalURL += temp + tempArray[i];
temp = "&";
}
}
}
else
{
var tmpAnchor = baseURL.split("#");
var TheParams = tmpAnchor[0];
TheAnchor = tmpAnchor[1];
if(TheParams)
baseURL = TheParams;
}
if(TheAnchor)
paramVal += "#" + TheAnchor;
var rows_txt = temp + "" + param + "=" + paramVal;
return baseURL + "?" + newAdditionalURL + rows_txt;
}

I think you want the query plugin.
E.g.:
window.location.search = jQuery.query.set("rows", 10);
This will work regardless of the current state of rows.

Quick little solution in pure js, no plugins needed:
function replaceQueryParam(param, newval, search) {
var regex = new RegExp("([?;&])" + param + "[^&;]*[;&]?");
var query = search.replace(regex, "$1").replace(/&$/, '');
return (query.length > 2 ? query + "&" : "?") + (newval ? param + "=" + newval : '');
}
Call it like this:
window.location = '/mypage' + replaceQueryParam('rows', 55, window.location.search)
Or, if you want to stay on the same page and replace multiple params:
var str = window.location.search
str = replaceQueryParam('rows', 55, str)
str = replaceQueryParam('cols', 'no', str)
window.location = window.location.pathname + str
edit, thanks Luke: To remove the parameter entirely, pass false or null for the value: replaceQueryParam('rows', false, params). Since 0 is also falsy, specify '0'.

To answer my own question 4 years later, after having learned a lot. Especially that you shouldn't use jQuery for everything. I've created a simple module that can parse/stringify a query string. This makes it easy to modify the query string.
You can use query-string as follows:
// parse the query string into an object
var q = queryString.parse(location.search);
// set the `row` property
q.rows = 10;
// convert the object to a query string
// and overwrite the existing query string
location.search = queryString.stringify(q);

A modern approach to this is to use native standard based URLSearchParams. It's supported by all major browsers, except for IE where they're polyfills available
const paramsString = "site.fwx?position=1&archiveid=5000&columns=5&rows=20&sorting=ModifiedTimeAsc"
const searchParams = new URLSearchParams(paramsString);
searchParams.set('rows', 10);
console.log(searchParams.toString()); // return modified string.

Ben Alman has a good jquery querystring/url plugin here that allows you to manipulate the querystring easily.
As requested -
Goto his test page here
In firebug enter the following into the console
jQuery.param.querystring(window.location.href, 'a=3&newValue=100');
It will return you the following amended url string
http://benalman.com/code/test/js-jquery-url-querystring.html?a=3&b=Y&c=Z&newValue=100#n=1&o=2&p=3
Notice the a querystring value for a has changed from X to 3 and it has added the new value.
You can then use the new url string however you wish e.g
using document.location = newUrl or change an anchor link etc

This is the modern way to change URL parameters:
function setGetParam(key,value) {
if (history.pushState) {
var params = new URLSearchParams(window.location.search);
params.set(key, value);
var newUrl = window.location.origin
+ window.location.pathname
+ '?' + params.toString();
window.history.pushState({path:newUrl},'',newUrl);
}
}

you can do it via normal JS also
var url = document.URL
var newAdditionalURL = "";
var tempArray = url.split("?");
var baseURL = tempArray[0];
var aditionalURL = tempArray[1];
var temp = "";
if(aditionalURL)
{
var tempArray = aditionalURL.split("&");
for ( var i in tempArray ){
if(tempArray[i].indexOf("rows") == -1){
newAdditionalURL += temp+tempArray[i];
temp = "&";
}
}
}
var rows_txt = temp+"rows=10";
var finalURL = baseURL+"?"+newAdditionalURL+rows_txt;

Use URLSearchParams to check, get and set the parameters value into URL
Here is the example to get the current URL and set new parameter and update the URL or reload the page as per your needs
var rows = 5; // value that you want to set
var url = new URL(window.location);
(url.searchParams.has('rows') ? url.searchParams.set('rows', rows) : url.searchParams.append('rows', rows));
url.search = url.searchParams;
url = url.toString();
// if you want to append into URL without reloading the page
history.pushState({}, null, url);
// want to reload the window with a new param
window.location = url;

2020 Solution: sets the variable or removes iti if you pass null or undefined to the value.
var setSearchParam = function(key, value) {
if (!window.history.pushState) {
return;
}
if (!key) {
return;
}
var url = new URL(window.location.href);
var params = new window.URLSearchParams(window.location.search);
if (value === undefined || value === null) {
params.delete(key);
} else {
params.set(key, value);
}
url.search = params;
url = url.toString();
window.history.replaceState({url: url}, null, url);
}

Would a viable alternative to String manipulation be to set up an html form and just modify the value of the rows element?
So, with html that is something like
<form id='myForm' target='site.fwx'>
<input type='hidden' name='position' value='1'/>
<input type='hidden' name='archiveid' value='5000'/>
<input type='hidden' name='columns' value='5'/>
<input type='hidden' name='rows' value='20'/>
<input type='hidden' name='sorting' value='ModifiedTimeAsc'/>
</form>
With the following JavaScript to submit the form
var myForm = document.getElementById('myForm');
myForm.rows.value = yourNewValue;
myForm.submit();
Probably not suitable for all situations, but might be nicer than parsing the URL string.

URL query parameters can be easily modified using URLSearchParams and History interfaces:
// Construct URLSearchParams object instance from current URL querystring.
var queryParams = new URLSearchParams(window.location.search);
// Set new or modify existing parameter value.
//queryParams.set("myParam", "myValue");
queryParams.set("rows", "10");
// Replace current querystring with the new one.
history.replaceState(null, null, "?"+queryParams.toString());
Alternatively instead of modifying current history entry using replaceState() we can use pushState() method to create a new one:
history.pushState(null, null, "?"+queryParams.toString());
https://zgadzaj.com/development/javascript/how-to-change-url-query-parameter-with-javascript-only

You can use this my library to do the job: https://github.com/Mikhus/jsurl
var url = new Url('site.fwx?position=1&archiveid=5000&columns=5&rows=20&sorting=ModifiedTimeAsc');
url.query.rows = 10;
alert( url);

Consider this one:
const myUrl = new URL("http://www.example.com?columns=5&rows=20");
myUrl.searchParams.set('rows', 10);
console.log(myUrl.href); // http://www.example.com?columns=5&rows=10
myUrl.searchParams.set('foo', 'bar'); // add new param
console.log(myUrl.href); // http://www.example.com?columns=5&rows=10&foo=bar
It will do exactly the same thing you required. Please note URL must have correct format. In your example you have to specify protocol (either http or https)

I wrote a little helper function that works with any select. All you need to do is add the class "redirectOnChange" to any select element, and this will cause the page to reload with a new/changed querystring parameter, equal to the id and value of the select, e.g:
<select id="myValue" class="redirectOnChange">
<option value="222">test222</option>
<option value="333">test333</option>
</select>
The above example would add "?myValue=222" or "?myValue=333" (or using "&" if other params exist), and reload the page.
jQuery:
$(document).ready(function () {
//Redirect on Change
$(".redirectOnChange").change(function () {
var href = window.location.href.substring(0, window.location.href.indexOf('?'));
var qs = window.location.href.substring(window.location.href.indexOf('?') + 1, window.location.href.length);
var newParam = $(this).attr("id") + '=' + $(this).val();
if (qs.indexOf($(this).attr("id") + '=') == -1) {
if (qs == '') {
qs = '?'
}
else {
qs = qs + '&'
}
qs = qs + newParam;
}
else {
var start = qs.indexOf($(this).attr("id") + "=");
var end = qs.indexOf("&", start);
if (end == -1) {
end = qs.length;
}
var curParam = qs.substring(start, end);
qs = qs.replace(curParam, newParam);
}
window.location.replace(href + '?' + qs);
});
});

Using javascript URL:
var url = new URL(window.location);
(url.searchParams.has('rows') ? url.searchParams.set('rows', rows) : url.searchParams.append('rows', rows));
window.location = url;

var url = new URL(window.location.href);
var search_params = url.searchParams;
search_params.set("param", value);
url.search = search_params.toString();
var new_url = url.pathname + url.search;
window.history.replaceState({}, '', new_url);

Here I have taken Adil Malik's answer and fixed the 3 issues I identified with it.
/**
* Adds or updates a URL parameter.
*
* #param {string} url the URL to modify
* #param {string} param the name of the parameter
* #param {string} paramVal the new value for the parameter
* #return {string} the updated URL
*/
self.setParameter = function (url, param, paramVal){
// http://stackoverflow.com/a/10997390/2391566
var parts = url.split('?');
var baseUrl = parts[0];
var oldQueryString = parts[1];
var newParameters = [];
if (oldQueryString) {
var oldParameters = oldQueryString.split('&');
for (var i = 0; i < oldParameters.length; i++) {
if(oldParameters[i].split('=')[0] != param) {
newParameters.push(oldParameters[i]);
}
}
}
if (paramVal !== '' && paramVal !== null && typeof paramVal !== 'undefined') {
newParameters.push(param + '=' + encodeURI(paramVal));
}
if (newParameters.length > 0) {
return baseUrl + '?' + newParameters.join('&');
} else {
return baseUrl;
}
}

In the URLSearchParams documentation, there's a very clean way of doing this, without affecting the history stack.
// URL: https://example.com?version=1.0
const params = new URLSearchParams(location.search);
params.set('version', 2.0);
window.history.replaceState({}, '', `${location.pathname}?${params}`);
// URL: https://example.com?version=2.0
Similarily, to remove a parameter
params.delete('version')
window.history.replaceState({}, '', `${location.pathname}?${params}`);
// URL: https://example.com?

let url= new URL("https://example.com/site.fwx?position=1&archiveid=5000&columns=5&rows=20&sorting=ModifiedTimeAsc")
url.searchParams.set('rows', 10)
console.log(url.toString())

Here is what I do. Using my editParams() function, you can add, remove, or change any parameter, then use the built in replaceState() function to update the URL:
window.history.replaceState('object or string', 'Title', 'page.html' + editParams('sorting', ModifiedTimeAsc));
// background functions below:
// add/change/remove URL parameter
// use a value of false to remove parameter
// returns a url-style string
function editParams (key, value) {
key = encodeURI(key);
var params = getSearchParameters();
if (Object.keys(params).length === 0) {
if (value !== false)
return '?' + key + '=' + encodeURI(value);
else
return '';
}
if (value !== false)
params[key] = encodeURI(value);
else
delete params[key];
if (Object.keys(params).length === 0)
return '';
return '?' + $.map(params, function (value, key) {
return key + '=' + value;
}).join('&');
}
// Get object/associative array of URL parameters
function getSearchParameters () {
var prmstr = window.location.search.substr(1);
return prmstr !== null && prmstr !== "" ? transformToAssocArray(prmstr) : {};
}
// convert parameters from url-style string to associative array
function transformToAssocArray (prmstr) {
var params = {},
prmarr = prmstr.split("&");
for (var i = 0; i < prmarr.length; i++) {
var tmparr = prmarr[i].split("=");
params[tmparr[0]] = tmparr[1];
}
return params;
}

My solution:
const setParams = (data) => {
if (typeof data !== 'undefined' && typeof data !== 'object') {
return
}
let url = new URL(window.location.href)
const params = new URLSearchParams(url.search)
for (const key of Object.keys(data)) {
if (data[key] == 0) {
params.delete(key)
} else {
params.set(key, data[key])
}
}
url.search = params
url = url.toString()
window.history.replaceState({ url: url }, null, url)
}
Then just call "setParams" and pass an object with data you want to set.
Example:
$('select').on('change', e => {
const $this = $(e.currentTarget)
setParams({ $this.attr('name'): $this.val() })
})
In my case I had to update a html select input when it changes and if the value is "0", remove the parameter. You can edit the function and remove the parameter from the url if the object key is "null" as well.
Hope this helps yall

If you want to change the url in address bar:
const search = new URLSearchParams(location.search);
search.set('rows', 10);
location.search = search.toString();
Note, changing location.search reloads the page.

Here is a simple solution using the query-string library.
const qs = require('query-string')
function addQuery(key, value) {
const q = qs.parse(location.search)
const url = qs.stringifyUrl(
{
url: location.pathname,
query: {
...q,
[key]: value,
},
},
{ skipEmptyString: true }
);
window.location.href = url
// if you are using Turbolinks
// add this: Turbolinks.visit(url)
}
// Usage
addQuery('page', 2)
If you are using react without react-router
export function useAddQuery() {
const location = window.location;
const addQuery = useCallback(
(key, value) => {
const q = qs.parse(location.search);
const url = qs.stringifyUrl(
{
url: location.pathname,
query: {
...q,
[key]: value,
},
},
{ skipEmptyString: true }
);
window.location.href = url
},
[location]
);
return { addQuery };
}
// Usage
const { addQuery } = useAddQuery()
addQuery('page', 2)
If you are using react with react-router
export function useAddQuery() {
const location = useLocation();
const history = useHistory();
const addQuery = useCallback(
(key, value) => {
let pathname = location.pathname;
let searchParams = new URLSearchParams(location.search);
searchParams.set(key, value);
history.push({
pathname: pathname,
search: searchParams.toString()
});
},
[location, history]
);
return { addQuery };
}
// Usage
const { addQuery } = useAddQuery()
addQuery('page', 2)
PS: qs is the import from query-string module.

Another variation on Sujoy's answer. Just changed the variable names & added a namespace wrapper:
window.MyNamespace = window.MyNamespace || {};
window.MyNamespace.Uri = window.MyNamespace.Uri || {};
(function (ns) {
ns.SetQueryStringParameter = function(url, parameterName, parameterValue) {
var otherQueryStringParameters = "";
var urlParts = url.split("?");
var baseUrl = urlParts[0];
var queryString = urlParts[1];
var itemSeparator = "";
if (queryString) {
var queryStringParts = queryString.split("&");
for (var i = 0; i < queryStringParts.length; i++){
if(queryStringParts[i].split('=')[0] != parameterName){
otherQueryStringParameters += itemSeparator + queryStringParts[i];
itemSeparator = "&";
}
}
}
var newQueryStringParameter = itemSeparator + parameterName + "=" + parameterValue;
return baseUrl + "?" + otherQueryStringParameters + newQueryStringParameter;
};
})(window.MyNamespace.Uri);
Useage is now:
var changedUrl = MyNamespace.Uri.SetQueryStringParameter(originalUrl, "CarType", "Ford");

I too have written a library for getting and setting URL query parameters in JavaScript.
Here is an example of its usage.
var url = Qurl.create()
, query
, foo
;
Get query params as an object, by key, or add/change/remove.
// returns { foo: 'bar', baz: 'qux' } for ?foo=bar&baz=qux
query = url.query();
// get the current value of foo
foo = url.query('foo');
// set ?foo=bar&baz=qux
url.query('foo', 'bar');
url.query('baz', 'qux');
// unset foo, leaving ?baz=qux
url.query('foo', false); // unsets foo

I was looking for the same thing and found: https://github.com/medialize/URI.js which is quite nice :)
-- Update
I found a better package: https://www.npmjs.org/package/qs it also deals with arrays in get params.

No library, using URL() WebAPI (https://developer.mozilla.org/en-US/docs/Web/API/URL)
function setURLParameter(url, parameter, value) {
let url = new URL(url);
if (url.searchParams.get(parameter) === value) {
return url;
}
url.searchParams.set(parameter, value);
return url.href;
}
This doesn't work on IE: https://developer.mozilla.org/en-US/docs/Web/API/URL#Browser_compatibility

I know this is an old question. I have enhanced the function above to add or update query params. Still a pure JS solution only.
function addOrUpdateQueryParam(param, newval, search) {
var questionIndex = search.indexOf('?');
if (questionIndex < 0) {
search = search + '?';
search = search + param + '=' + newval;
return search;
}
var regex = new RegExp("([?;&])" + param + "[^&;]*[;&]?");
var query = search.replace(regex, "$1").replace(/&$/, '');
var indexOfEquals = query.indexOf('=');
return (indexOfEquals >= 0 ? query + '&' : query + '') + (newval ? param + '=' + newval : '');
}

my function support removing param
function updateURLParameter(url, param, paramVal, remove = false) {
var newAdditionalURL = '';
var tempArray = url.split('?');
var baseURL = tempArray[0];
var additionalURL = tempArray[1];
var rows_txt = '';
if (additionalURL)
newAdditionalURL = decodeURI(additionalURL) + '&';
if (remove)
newAdditionalURL = newAdditionalURL.replace(param + '=' + paramVal, '');
else
rows_txt = param + '=' + paramVal;
window.history.replaceState('', '', (baseURL + "?" + newAdditionalURL + rows_txt).replace('?&', '?').replace('&&', '&').replace(/\&$/, ''));
}

How to remove some parameters from an URL string?

I have this var storing a string that represents a URL full of parameters. I'm using AngularJS, and I'm not sure if there is any useful module (or maybe with plain JavaScript) to remove the unneeded URL parameters without having to use regex?
For example I need to remove &month=05 and also &year=2017 from:
var url = "at merge ?derivate=21&gear_type__in=13&engine=73&month=05&year=2017"

Use the URLSearchParams API:
var url = "at merge ?derivate=21&gear_type__in=13&engine=73&month=05&year=2017"
var urlParts = url.split('?');
var params = new URLSearchParams(urlParts[1]);
params.delete('month');
params.delete('year')
var newUrl = urlParts[0] + '?' + params.toString()
console.log(newUrl);
The advantage of using this API is that it works with and creates strings with correct percent encoding.
For more information, see MDN Developer Reference - URLSearchParams API.

You can use this function that take 2 parameters: the param you are trying to remove and your source URL:
function removeParam(key, sourceURL) {
var rtn = sourceURL.split("?")[0],
param,
params_arr = [],
queryString = (sourceURL.indexOf("?") !== -1) ? sourceURL.split("?")[1] : "";
if (queryString !== "") {
params_arr = queryString.split("&");
for (var i = params_arr.length - 1; i >= 0; i -= 1) {
param = params_arr[i].split("=")[0];
if (param === key) {
params_arr.splice(i, 1);
}
}
rtn = rtn + "?" + params_arr.join("&");
}
return rtn;
}
var url = "at merge ?derivate=21&gear_type__in=13&engine=73&month=05&year=2017";
var url2 = removeParam("month", url);
var url3 = removeParam("year", url2);
console.log(url3);
Alternative solution with a regex

Sure you can use RegExr: ((&)year=([^&]))|((&)month=([^&]))
use:
url = url.replace(/(year=([^&]*))|(month=([^&]*))/g, '');
Read more regex :)...
function removeParam(name, url){
return url.replace('/((&)*' + name + '=([^&]*))/g','');
}
var url = "?derivate=21&gear_type__in=13&engine=73&month=05&year=2017"
function removeParam(name, _url){
var reg = new RegExp("((&)*" + name + "=([^&]*))","g");
return _url.replace(reg,'');
}
url = removeParam('year', url);
url = removeParam('month', url);
document.getElementById('url-replace').innerHTML = url;
<div id="url-replace"></div>

Using string replace:
var url = "at merge ?derivate=21&gear_type__in=13&engine=73&month=05&year=2017";
var modifiedUrl = url.replace('&month=05','').replace('&year=2017','');
console.log(modifiedUrl);

You can use the library https://www.npmjs.com/package/query-string
Convert the params to an object and then just use delete params.year delete params.month and convert it back and add it to the original url
const queryString = require('query-string');
console.log(location.search);
//=> '?foo=bar'
const parsed = queryString.parse(location.search);
console.log(parsed);
//=> {foo: 'bar'}
console.log(location.hash);
//=> '#token=bada55cafe'
const parsedHash = queryString.parse(location.hash);
console.log(parsedHash);
//=> {token: 'bada55cafe'}
parsed.foo = 'unicorn';
parsed.ilike = 'pizza';
const stringified = queryString.stringify(parsed);
//=> 'foo=unicorn&ilike=pizza'
location.search = stringified;
// note that `location.search` automatically prepends a question mark
console.log(location.search);
//=> '?foo=unicorn&ilike=pizza'

Enhnaced #Mistalis's answer.
Return the value of the last occurrence of a param
Remove the ? of the removed param was the only param
Url encoded the query params to ensure browser stately
function pruneParams(key, url) {
var urlParts = url.split('?');
var rtnUrl = urlParts[0];
var paramParts;
var paramValue;
var params_arr = [];
var queryString = decodeURIComponent(urlParts[1] || '');
if (queryString !== '') {
params_arr = queryString.split('&');
for (var i = params_arr.length - 1; i >= 0; --i) {
paramParts = params_arr[i].split('=');
if (paramParts[0] === key) {
paramValue = paramParts[1];
params_arr.splice(i, 1);
}
}
if (params_arr.length) {
var wasEncoded = url.split('&').length < 2;
rtnUrl = rtnUrl + '?' + (wasEncoded ? encodeURIComponent(params_arr.join('&')) : params_arr.join('&'));
}
}
return { url: rtnUrl, [key]: paramValue, paramCount: params_arr.length > 1 };
}
var u1 = 'http://localhost:4200/member/';
var u2 = 'http://localhost:4200/member/?ts=23423424';
var u3 = 'http://localhost:4200/member/?fooo=2342342asfasf&ts=252523525';
var u4 = 'http://localhost:4200/member?foo=234243&ts=234124124&bar=21kfafjasf&ts=223424234&dd=This Is A Line';
var u5 = 'http://localhost:4200/member?foo%3D234243%26ts%3D2242424%26bar%3D21kfafjasf%26dd%3DThis%20Is%20A%20Line';
console.log(pruneParams('ts', u1));
console.log(pruneParams('ts', u2));
console.log(pruneParams('ts', u3));
console.log(pruneParams('ts', u4));
console.log(pruneParams('ts', u5));
// {
// url: 'http://localhost:4200/member/',
// ts: undefined,
// paramCount: false,
// }
// {
// url: 'http://localhost:4200/member/',
// ts: '23423424',
// paramCount: false,
// }
// {
// url: 'http://localhost:4200/member/?fooo=2342342asfasf',
// ts: '252523525',
// paramCount: false,
// },
// {
// url: 'http://localhost:4200/member?foo=234243&bar=21kfafjasf&dd=This Is A Line',
// ts: '234124124',
// paramCount: true,
// }
// {
// url: 'http://localhost:4200/member?foo%3D234243%26bar%3D21kfafjasf%26dd%3DThis%20Is%20A%20Line',
// ts: '2242424',
// paramCount: true,
// }

Taken from #Mistalis answer but tidied up. Useful if URLSearchParams API is not available.
const removeUrlParam = function (url, param) {
var parts = url.split('?')
url = parts[0]
if (parts.length !== 2) return url
var qs = parts[1]
if (qs === '') return url
var params = qs.split('&')
for (var i = params.length - 1; i >= 0; i -= 1) {
var key = params[i].split('=')[0]
if (key === param) params.splice(i, 1)
}
return params.length ? url + '?' + params.join('&') : url
}
var url1 = removeUrlParam('/xxxxx', 'a')
var url2 = removeUrlParam('/xxxxx?a=1', 'a')
var url3 = removeUrlParam('/xxxxx?a=1&b=2', 'a')
console.log(url1, url2, url3)

How can I put all the URL parameters in array of objects using jQuery?

I have a giving string/url like this
https://example.com/loadcontent?var1=100&var2=:somevar&var3=:morevariables
I need to loop thought each parameter in the url. If the value starts with : this indicated that it is a variable an I will need to change that value dynamically by looking at the corresponding meta attribute that matches that variable.
Here is my code in which loops over an array and sets the value of the parameters.
var baseURL = getBaseURL(url);
var params = getParams(url);
var newParams = $.each(params, function(index, param){
if( param.value.substring(0, 1) == ':'){
var myVar = param.value.substring(1);
param.value = $('meta[name=" + myVar + "']).attr('value');
}
});
var finalURL = baseURL + '?' + jQuery.param( newParams );
function getParams(url){
// This function should return an array of objects. Each object should have 2 properties "value" and "name". The "name" property should be the name of the parameter (ie. var1, var2, var3 .....) and the "value" attribute should contains the value of the parameter (ie. 100, :somevar, :morevariables)
}
function getBaseURL(url){
var cutoff = url.indexOf('?');
if( cutoff > -1){
return url.substring(0, cutoff - 1);
}
return url;
}
I need help converting the parameters of a giving URL to array of object. How can I do this in jQuery?

You dont need jQuery for this one.
function getParams(url) {
var queryString = url.substring(url.indexOf('?') + 1);
var paramsArr = queryString.split('&');
var params = [];
for (var i = 0, len = paramsArr.length; i < len; i++) {
var keyValuePair = paramsArr[i].split('=');
params.push({
name: keyValuePair[0],
value: keyValuePair[1]
});
}
return params;
}

Here is an example using map
var url = 'https://example.com/loadcontent?var1=100&var2=:somevar&var3=:morevariables&test';
function getParamArray(url) {
var queryString = url.substring(url.lastIndexOf("?") + 1);
return queryString.split('&').map(function(sParam) {
var param = sParam.split('=');
return {
name: param[0],
value: decodeURIComponent(param[1])
};
});
}
document.getElementById("output").innerHTML = JSON.stringify(getParamArray(url), null, 2);
<pre id="output"></pre>

With a regular expresion and JSON.parse:
var url = 'https://example.com/loadcontent?var1=100&var2=:somevar&var3=:morevariables';
url = url.replace(/^.*\?/,'');
url = url.replace(/(\w+)=?([\w:]*)/g,'{"name":"$1","value":"$2"}');
url = url.replace(/&/g,',');
var paramsObject = JSON.parse("["+url+"]");
/*
Returns:
Array [{"name":"var1","value":"100"},{"name":"var2","value":":somevar"},{"name":"var3","value":":morevariables"}];
*/

You don't even need JQuery for this.
<script type="text/javascript">
var paramStr = window.location.search;
var params = paramStr.substring(1, paramStr.length).split('&');
var paramList = [];
for (var index=0; index < params.length; index++) {
var param = params[index].split('=');
paramList.push({name: param[0], value: param[1]});
}
</script>
The result:
[Object]0: Object
name: "a"
value: "b"
...

var url=new URLSearchParams(window.location.search);
var params = [];
for(var value of url.keys())
{
params.push({
name: value,
value: url.get(value)
});
}

javascript / jquery modify query string parameter

I need to add or, if it already exists, modify one parameter of a URL query-string.
If I for example want to set param to the value newvalue,
http://example.org/file.php should lead to http://example.org/file.php?param=newvalue
http://example.org/file.php?abc=def should lead to http://example.org/file.php?abc=def&param=newvalue
http://example.org/file.php?param=oldValue should lead to http://example.org/file.php?param=newvalue
I know about the URI.js library, but it's smallest possible size of 21kb (non-gziped) is too big for me.
I am looking for either a small library to modify url-query-strings, or a small piece of code which does this for me.

Here's a solution in all JS, although it would make sense to make this a combo js/php script
var myParam = "foo"
var oldValue = "bar"
var newValue = "fighters"
var queryPairs = window.location.search.substr(1).split("&");
var queryParams = [];
queryPairs.forEach(function(element, index, array){
var pair = element.split("=");
queryParams[pair[0]] = pair[1];
})
if (queryParams[myParam] == oldValue){
queryParams[myParam] = newValue;
queryPairs = [];
for (var index in queryParams){
queryPairs.push(index + "=" + queryParams[index]);
}
var baseUrl = window.location.href.split("?")[0];
var newSearch = queryPairs.join("&")
var newUrl = baseUrl + "?" + newSearch
window.location = newUrl;
}

My (pretty long) version:
if (location.search.match(/([?&]param)=([^&#]*)/g)) {
location.search = location.search.replace(/([?&]param)=([^&#]*)/g, '$1=' + newvalue);
} else if (location.search.match(/([&][^&#]*)=/g)) {
location.search = location.search + "&param=" + newvalue;
} else {
location.search = location.search + "?param=" + newvalue;
}

How can I add or update a query string parameter?

With javascript how can I add a query string parameter to the url if not present or if it present, update the current value? I am using jquery for my client side development.

I wrote the following function which accomplishes what I want to achieve:
function updateQueryStringParameter(uri, key, value) {
var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");
var separator = uri.indexOf('?') !== -1 ? "&" : "?";
if (uri.match(re)) {
return uri.replace(re, '$1' + key + "=" + value + '$2');
}
else {
return uri + separator + key + "=" + value;
}
}

Update (2020): URLSearchParams is now supported by all modern browsers.
The URLSearchParams utility can be useful for this in combination with window.location.search. For example:
if ('URLSearchParams' in window) {
var searchParams = new URLSearchParams(window.location.search);
searchParams.set("foo", "bar");
window.location.search = searchParams.toString();
}
Now foo has been set to bar regardless of whether or not it already existed.
However, the above assignment to window.location.search will cause a page load, so if that's not desirable use the History API as follows:
if ('URLSearchParams' in window) {
var searchParams = new URLSearchParams(window.location.search)
searchParams.set("foo", "bar");
var newRelativePathQuery = window.location.pathname + '?' + searchParams.toString();
history.pushState(null, '', newRelativePathQuery);
}
Now you don't need to write your own regex or logic to handle the possible existence of query strings.
However, browser support is poor as it's currently experimental and only in use in recent versions of Chrome, Firefox, Safari, iOS Safari, Android Browser, Android Chrome and Opera. Use with a polyfill if you do decide to use it.

I have expanded the solution and combined it with another that I found to replace/update/remove the querystring parameters based on the users input and taking the urls anchor into consideration.
Not supplying a value will remove the parameter, supplying one will add/update the parameter. If no URL is supplied, it will be grabbed from window.location
function UpdateQueryString(key, value, url) {
if (!url) url = window.location.href;
var re = new RegExp("([?&])" + key + "=.*?(&|#|$)(.*)", "gi"),
hash;
if (re.test(url)) {
if (typeof value !== 'undefined' && value !== null) {
return url.replace(re, '$1' + key + "=" + value + '$2$3');
}
else {
hash = url.split('#');
url = hash[0].replace(re, '$1$3').replace(/(&|\?)$/, '');
if (typeof hash[1] !== 'undefined' && hash[1] !== null) {
url += '#' + hash[1];
}
return url;
}
}
else {
if (typeof value !== 'undefined' && value !== null) {
var separator = url.indexOf('?') !== -1 ? '&' : '?';
hash = url.split('#');
url = hash[0] + separator + key + '=' + value;
if (typeof hash[1] !== 'undefined' && hash[1] !== null) {
url += '#' + hash[1];
}
return url;
}
else {
return url;
}
}
}
Update
There was a bug when removing the first parameter in the querystring, I have reworked the regex and test to include a fix.
Second Update
As suggested by #JarónBarends - Tweak value check to check against undefined and null to allow setting 0 values
Third Update
There was a bug where removing a querystring variable directly before a hashtag would lose the hashtag symbol which has been fixed
Fourth Update
Thanks #rooby for pointing out a regex optimization in the first RegExp object.
Set initial regex to ([?&]) due to issue with using (\?|&) found by #YonatanKarni
Fifth Update
Removing declaring hash var in if/else statement

Based on #amateur's answer (and now incorporating the fix from #j_walker_dev comment), but taking into account the comment about hash tags in the url I use the following:
function updateQueryStringParameter(uri, key, value) {
var re = new RegExp("([?&])" + key + "=.*?(&|#|$)", "i");
if (uri.match(re)) {
return uri.replace(re, '$1' + key + "=" + value + '$2');
} else {
var hash = '';
if( uri.indexOf('#') !== -1 ){
hash = uri.replace(/.*#/, '#');
uri = uri.replace(/#.*/, '');
}
var separator = uri.indexOf('?') !== -1 ? "&" : "?";
return uri + separator + key + "=" + value + hash;
}
}
Edited to fix [?|&] in regex which should of course be [?&] as pointed out in the comments
Edit: Alternative version to support removing URL params as well. I have used value === undefined as the way to indicate removal. Could use value === false or even a separate input param as wanted.
function updateQueryStringParameter(uri, key, value) {
var re = new RegExp("([?&])" + key + "=.*?(&|#|$)", "i");
if( value === undefined ) {
if (uri.match(re)) {
return uri.replace(re, '$1$2').replace(/[?&]$/, '').replaceAll(/([?&])&+/g, '$1').replace(/[?&]#/, '#');
} else {
return uri;
}
} else {
if (uri.match(re)) {
return uri.replace(re, '$1' + key + "=" + value + '$2');
} else {
var hash = '';
if( uri.indexOf('#') !== -1 ){
hash = uri.replace(/.*#/, '#');
uri = uri.replace(/#.*/, '');
}
var separator = uri.indexOf('?') !== -1 ? "&" : "?";
return uri + separator + key + "=" + value + hash;
}
}
}
See it in action at https://jsfiddle.net/cdt16wex/

You can use the browser's native URL API to do this in a fairly simple way, where key and value are your parameter name and parameter value respectively.
const url = new URL(location.href);
url.searchParams.set(key, value);
history.pushState(null, '', url);
This will preserve everything about the URL and only change or add the one query param. You can also use replaceState instead of pushState if you don't want it to create a new browser history entry.

Thanks to modern javascript, node.js and browsers support, we can get out of 3rd-party library whirlpool (jquery, query-string etc.) and DRY ourselves.
Here are javascript(node.js) and typescript version for a function that adds or updates query params of given url:
Javascript
const getUriWithParam = (baseUrl, params) => {
const Url = new URL(baseUrl);
const urlParams = new URLSearchParams(Url.search);
for (const key in params) {
if (params[key] !== undefined) {
urlParams.set(key, params[key]);
}
}
Url.search = urlParams.toString();
return Url.toString();
};
console.info('expected: https://example.com/?foo=bar');
console.log(getUriWithParam("https://example.com", {foo: "bar"}));
console.info('expected: https://example.com/slug?foo=bar#hash');
console.log(getUriWithParam("https://example.com/slug#hash", {foo: "bar"}));
console.info('expected: https://example.com/?bar=baz&foo=bar');
console.log(getUriWithParam("https://example.com?bar=baz", {foo: "bar"}));
console.info('expected: https://example.com/?foo=baz&bar=baz');
console.log(getUriWithParam("https://example.com?foo=bar&bar=baz", {foo: "baz"}));
Typescript
const getUriWithParam = (
baseUrl: string,
params: Record<string, any>
): string => {
const Url = new URL(baseUrl);
const urlParams: URLSearchParams = new URLSearchParams(Url.search);
for (const key in params) {
if (params[key] !== undefined) {
urlParams.set(key, params[key]);
}
}
Url.search = urlParams.toString();
return Url.toString();
};
For React Native
URL is not implemented in React Native. So you have to install react-native-url-polyfill beforehand.
For object params
See the second solution in this answer

Here is my library to do that: https://github.com/Mikhus/jsurl
var u = new Url;
u.query.param='value'; // adds or replaces the param
alert(u)

If it's not set or want to update with a new value you can use:
window.location.search = 'param=value'; // or param=new_value
This is in simple Javascript, by the way.
EDIT
You may want to try using the jquery query-object plugin
window.location.search =
jQuery.query.set("param", 5);

I realize this question is old and has been answered to death, but here's my stab at it. I'm trying to reinvent the wheel here because I was using the currently accepted answer and the mishandling of URL fragments recently bit me in a project.
The function is below. It's quite long, but it was made to be as resilient as possible. I would love suggestions for shortening/improving it. I put together a small jsFiddle test suite for it (or other similar functions). If a function can pass every one of the tests there, I say it's probably good to go.
Update: I came across a cool function for using the DOM to parse URLs, so I incorporated that technique here. It makes the function shorter and more reliable. Props to the author of that function.
/**
* Add or update a query string parameter. If no URI is given, we use the current
* window.location.href value for the URI.
*
* Based on the DOM URL parser described here:
* http://james.padolsey.com/javascript/parsing-urls-with-the-dom/
*
* #param (string) uri Optional: The URI to add or update a parameter in
* #param (string) key The key to add or update
* #param (string) value The new value to set for key
*
* Tested on Chrome 34, Firefox 29, IE 7 and 11
*/
function update_query_string( uri, key, value ) {
// Use window URL if no query string is provided
if ( ! uri ) { uri = window.location.href; }
// Create a dummy element to parse the URI with
var a = document.createElement( 'a' ),
// match the key, optional square brackets, an equals sign or end of string, the optional value
reg_ex = new RegExp( key + '((?:\\[[^\\]]*\\])?)(=|$)(.*)' ),
// Setup some additional variables
qs,
qs_len,
key_found = false;
// Use the JS API to parse the URI
a.href = uri;
// If the URI doesn't have a query string, add it and return
if ( ! a.search ) {
a.search = '?' + key + '=' + value;
return a.href;
}
// Split the query string by ampersands
qs = a.search.replace( /^\?/, '' ).split( /&(?:amp;)?/ );
qs_len = qs.length;
// Loop through each query string part
while ( qs_len > 0 ) {
qs_len--;
// Remove empty elements to prevent double ampersands
if ( ! qs[qs_len] ) { qs.splice(qs_len, 1); continue; }
// Check if the current part matches our key
if ( reg_ex.test( qs[qs_len] ) ) {
// Replace the current value
qs[qs_len] = qs[qs_len].replace( reg_ex, key + '$1' ) + '=' + value;
key_found = true;
}
}
// If we haven't replaced any occurrences above, add the new parameter and value
if ( ! key_found ) { qs.push( key + '=' + value ); }
// Set the new query string
a.search = '?' + qs.join( '&' );
return a.href;
}

window.location.search is read/write.
However - modifying the query string will redirect the page you're on and cause a refresh from the server.
If what you're attempting to do is maintain client side state (and potentially make it bookmark-able), you'll want to modify the URL hash instead of the query string, which keeps you on the same page (window.location.hash is read/write). This is how web sites like twitter.com do this.
You'll also want the back button to work, you'll have to bind javascript events to the hash change event, a good plugin for that is http://benalman.com/projects/jquery-hashchange-plugin/

Here's my approach: The location.params() function (shown below) can be used as a getter or setter. Examples:
Given the URL is http://example.com/?foo=bar&baz#some-hash,
location.params() will return an object with all the query parameters: {foo: 'bar', baz: true}.
location.params('foo') will return 'bar'.
location.params({foo: undefined, hello: 'world', test: true}) will change the URL to http://example.com/?baz&hello=world&test#some-hash.
Here is the params() function, which can optionally be assigned to the window.location object.
location.params = function(params) {
var obj = {}, i, parts, len, key, value;
if (typeof params === 'string') {
value = location.search.match(new RegExp('[?&]' + params + '=?([^&]*)[&#$]?'));
return value ? value[1] : undefined;
}
var _params = location.search.substr(1).split('&');
for (i = 0, len = _params.length; i < len; i++) {
parts = _params[i].split('=');
if (! parts[0]) {continue;}
obj[parts[0]] = parts[1] || true;
}
if (typeof params !== 'object') {return obj;}
for (key in params) {
value = params[key];
if (typeof value === 'undefined') {
delete obj[key];
} else {
obj[key] = value;
}
}
parts = [];
for (key in obj) {
parts.push(key + (obj[key] === true ? '' : '=' + obj[key]));
}
location.search = parts.join('&');
};

I know this is quite old but i want to fires my working version in here.
function addOrUpdateUrlParam(uri, paramKey, paramVal) {
var re = new RegExp("([?&])" + paramKey + "=[^&#]*", "i");
if (re.test(uri)) {
uri = uri.replace(re, '$1' + paramKey + "=" + paramVal);
} else {
var separator = /\?/.test(uri) ? "&" : "?";
uri = uri + separator + paramKey + "=" + paramVal;
}
return uri;
}
jQuery(document).ready(function($) {
$('#paramKey,#paramValue').on('change', function() {
if ($('#paramKey').val() != "" && $('#paramValue').val() != "") {
$('#uri').val(addOrUpdateUrlParam($('#uri').val(), $('#paramKey').val(), $('#paramValue').val()));
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input style="width:100%" type="text" id="uri" value="http://www.example.com/text.php">
<label style="display:block;">paramKey
<input type="text" id="paramKey">
</label>
<label style="display:block;">paramValue
<input type="text" id="paramValue">
</label>
NOTE This is a modified version of #elreimundo

It's so simple with URLSearchParams, supported in all modern browsers (caniuse).
let p = new URLSearchParams();
p.set("foo", "bar");
p.set("name", "Jack & Jill?");
console.log("http://example.com/?" + p.toString());
If you want to modify the existing URL, construct the object like this: new URLSearchParams(window.location.search) and assign the string to window.location.search.

My take from here (compatible with "use strict"; does not really use jQuery):
function decodeURIParams(query) {
if (query == null)
query = window.location.search;
if (query[0] == '?')
query = query.substring(1);
var params = query.split('&');
var result = {};
for (var i = 0; i < params.length; i++) {
var param = params[i];
var pos = param.indexOf('=');
if (pos >= 0) {
var key = decodeURIComponent(param.substring(0, pos));
var val = decodeURIComponent(param.substring(pos + 1));
result[key] = val;
} else {
var key = decodeURIComponent(param);
result[key] = true;
}
}
return result;
}
function encodeURIParams(params, addQuestionMark) {
var pairs = [];
for (var key in params) if (params.hasOwnProperty(key)) {
var value = params[key];
if (value != null) /* matches null and undefined */ {
pairs.push(encodeURIComponent(key) + '=' + encodeURIComponent(value))
}
}
if (pairs.length == 0)
return '';
return (addQuestionMark ? '?' : '') + pairs.join('&');
}
//// alternative to $.extend if not using jQuery:
// function mergeObjects(destination, source) {
// for (var key in source) if (source.hasOwnProperty(key)) {
// destination[key] = source[key];
// }
// return destination;
// }
function navigateWithURIParams(newParams) {
window.location.search = encodeURIParams($.extend(decodeURIParams(), newParams), true);
}
Example usage:
// add/update parameters
navigateWithURIParams({ foo: 'bar', boz: 42 });
// remove parameter
navigateWithURIParams({ foo: null });
// submit the given form by adding/replacing URI parameters (with jQuery)
$('.filter-form').submit(function(e) {
e.preventDefault();
navigateWithURIParams(decodeURIParams($(this).serialize()));
});

Based on the answer #ellemayo gave, I came up with the following solution that allows for disabling of the hash tag if desired:
function updateQueryString(key, value, options) {
if (!options) options = {};
var url = options.url || location.href;
var re = new RegExp("([?&])" + key + "=.*?(&|#|$)(.*)", "gi"), hash;
hash = url.split('#');
url = hash[0];
if (re.test(url)) {
if (typeof value !== 'undefined' && value !== null) {
url = url.replace(re, '$1' + key + "=" + value + '$2$3');
} else {
url = url.replace(re, '$1$3').replace(/(&|\?)$/, '');
}
} else if (typeof value !== 'undefined' && value !== null) {
var separator = url.indexOf('?') !== -1 ? '&' : '?';
url = url + separator + key + '=' + value;
}
if ((typeof options.hash === 'undefined' || options.hash) &&
typeof hash[1] !== 'undefined' && hash[1] !== null)
url += '#' + hash[1];
return url;
}
Call it like this:
updateQueryString('foo', 'bar', {
url: 'http://my.example.com#hash',
hash: false
});
Results in:
http://my.example.com?foo=bar

Here is a shorter version that takes care of
query with or without a given parameter
query with multiple parameter values
query containing hash
Code:
var setQueryParameter = function(uri, key, value) {
var re = new RegExp("([?&])("+ key + "=)[^&#]*", "g");
if (uri.match(re))
return uri.replace(re, '$1$2' + value);
// need to add parameter to URI
var paramString = (uri.indexOf('?') < 0 ? "?" : "&") + key + "=" + value;
var hashIndex = uri.indexOf('#');
if (hashIndex < 0)
return uri + paramString;
else
return uri.substring(0, hashIndex) + paramString + uri.substring(hashIndex);
}
The regex description can be found here.
NOTE: This solution is based on #amateur answer, but with many improvements.

Code that appends a list of parameters to an existing url using ES6 and jQuery:
class UrlBuilder {
static appendParametersToUrl(baseUrl, listOfParams) {
if (jQuery.isEmptyObject(listOfParams)) {
return baseUrl;
}
const newParams = jQuery.param(listOfParams);
let partsWithHash = baseUrl.split('#');
let partsWithParams = partsWithHash[0].split('?');
let previousParams = '?' + ((partsWithParams.length === 2) ? partsWithParams[1] + '&' : '');
let previousHash = (partsWithHash.length === 2) ? '#' + partsWithHash[1] : '';
return partsWithParams[0] + previousParams + newParams + previousHash;
}
}
Where listOfParams is like
const listOfParams = {
'name_1': 'value_1',
'name_2': 'value_2',
'name_N': 'value_N',
};
Example of Usage:
UrlBuilder.appendParametersToUrl(urlBase, listOfParams);
Fast tests:
url = 'http://hello.world';
console.log('=> ', UrlParameters.appendParametersToUrl(url, null));
// Output: http://hello.world
url = 'http://hello.world#h1';
console.log('=> ', UrlParameters.appendParametersToUrl(url, null));
// Output: http://hello.world#h1
url = 'http://hello.world';
params = {'p1': 'v1', 'p2': 'v2'};
console.log('=> ', UrlParameters.appendParametersToUrl(url, params));
// Output: http://hello.world?p1=v1&p2=v2
url = 'http://hello.world?p0=v0';
params = {'p1': 'v1', 'p2': 'v2'};
console.log('=> ', UrlParameters.appendParametersToUrl(url, params));
// Output: http://hello.world?p0=v0&p1=v1&p2=v2
url = 'http://hello.world#h1';
params = {'p1': 'v1', 'p2': 'v2'};
console.log('=> ', UrlParameters.appendParametersToUrl(url, params));
// Output: http://hello.world?p1=v1&p2=v2#h1
url = 'http://hello.world?p0=v0#h1';
params = {'p1': 'v1', 'p2': 'v2'};
console.log('=> ', UrlParameters.appendParametersToUrl(url, params));
// Output: http://hello.world?p0=v0&p1=v1&p2=v2#h1

To give an code example for modifying window.location.search as suggested by Gal and tradyblix:
var qs = window.location.search || "?";
var param = key + "=" + value; // remember to URI encode your parameters
if (qs.length > 1) {
// more than just the question mark, so append with ampersand
qs = qs + "&";
}
qs = qs + param;
window.location.search = qs;

A different approach without using regular expressions. Supports 'hash' anchors at the end of the url as well as multiple question mark charcters (?). Should be slightly faster than the regular expression approach.
function setUrlParameter(url, key, value) {
var parts = url.split("#", 2), anchor = parts.length > 1 ? "#" + parts[1] : '';
var query = (url = parts[0]).split("?", 2);
if (query.length === 1)
return url + "?" + key + "=" + value + anchor;
for (var params = query[query.length - 1].split("&"), i = 0; i < params.length; i++)
if (params[i].toLowerCase().startsWith(key.toLowerCase() + "="))
return params[i] = key + "=" + value, query[query.length - 1] = params.join("&"), query.join("?") + anchor;
return url + "&" + key + "=" + value + anchor
}

Use this function to add, remove and modify query string parameter from URL based on jquery
/**
#param String url
#param object param {key: value} query parameter
*/
function modifyURLQuery(url, param){
var value = {};
var query = String(url).split('?');
if (query[1]) {
var part = query[1].split('&');
for (i = 0; i < part.length; i++) {
var data = part[i].split('=');
if (data[0] && data[1]) {
value[data[0]] = data[1];
}
}
}
value = $.extend(value, param);
// Remove empty value
for (i in value){
if(!value[i]){
delete value[i];
}
}
// Return url with modified parameter
if(value){
return query[0] + '?' + $.param(value);
} else {
return query[0];
}
}
Add new and modify existing parameter to url
var new_url = modifyURLQuery("http://google.com?foo=34", {foo: 50, bar: 45});
// Result: http://google.com?foo=50&bar=45
Remove existing
var new_url = modifyURLQuery("http://google.com?foo=50&bar=45", {bar: null});
// Result: http://google.com?foo=50

Here's my slightly different approach to this, written as an excercise
function addOrChangeParameters( url, params )
{
let splitParams = {};
let splitPath = (/(.*)[?](.*)/).exec(url);
if ( splitPath && splitPath[2] )
splitPath[2].split("&").forEach( k => { let d = k.split("="); splitParams[d[0]] = d[1]; } );
let newParams = Object.assign( splitParams, params );
let finalParams = Object.keys(newParams).map( (a) => a+"="+newParams[a] ).join("&");
return splitPath ? (splitPath[1] + "?" + finalParams) : (url + "?" + finalParams);
}
usage:
const url = "http://testing.com/path?empty&value1=test&id=3";
addOrChangeParameters( url, {value1:1, empty:"empty", new:0} )
"http://testing.com/path?empty=empty&value1=1&id=3&new=0"

This answer is just a small tweak of ellemayo's answer. It will automatically update the URL instead of just returning the updated string.
function _updateQueryString(key, value, url) {
if (!url) url = window.location.href;
let updated = ''
var re = new RegExp("([?&])" + key + "=.*?(&|#|$)(.*)", "gi"),
hash;
if (re.test(url)) {
if (typeof value !== 'undefined' && value !== null) {
updated = url.replace(re, '$1' + key + "=" + value + '$2$3');
}
else {
hash = url.split('#');
url = hash[0].replace(re, '$1$3').replace(/(&|\?)$/, '');
if (typeof hash[1] !== 'undefined' && hash[1] !== null) {
url += '#' + hash[1];
}
updated = url;
}
}
else {
if (typeof value !== 'undefined' && value !== null) {
var separator = url.indexOf('?') !== -1 ? '&' : '?';
hash = url.split('#');
url = hash[0] + separator + key + '=' + value;
if (typeof hash[1] !== 'undefined' && hash[1] !== null) {
url += '#' + hash[1];
}
updated = url;
}
else {
updated = url;
}
}
window.history.replaceState({ path: updated }, '', updated);
}

Java script code to find a specific query string and replace its value *
('input.letter').click(function () {
//0- prepare values
var qsTargeted = 'letter=' + this.value; //"letter=A";
var windowUrl = '';
var qskey = qsTargeted.split('=')[0];
var qsvalue = qsTargeted.split('=')[1];
//1- get row url
var originalURL = window.location.href;
//2- get query string part, and url
if (originalURL.split('?').length > 1) //qs is exists
{
windowUrl = originalURL.split('?')[0];
var qs = originalURL.split('?')[1];
//3- get list of query strings
var qsArray = qs.split('&');
var flag = false;
//4- try to find query string key
for (var i = 0; i < qsArray.length; i++) {
if (qsArray[i].split('=').length > 0) {
if (qskey == qsArray[i].split('=')[0]) {
//exists key
qsArray[i] = qskey + '=' + qsvalue;
flag = true;
break;
}
}
}
if (!flag)// //5- if exists modify,else add
{
qsArray.push(qsTargeted);
}
var finalQs = qsArray.join('&');
//6- prepare final url
window.location = windowUrl + '?' + finalQs;
}
else {
//6- prepare final url
//add query string
window.location = originalURL + '?' + qsTargeted;
}
})
});

Here's an alternative method using the inbuilt properties of the anchor HTML element:
Handles multi-valued parameters.
No risk of modifying the # fragment, or anything other than the query string itself.
May be a little easier to read? But it is longer.
var a = document.createElement('a'),
getHrefWithUpdatedQueryString = function(param, value) {
return updatedQueryString(window.location.href, param, value);
},
updatedQueryString = function(url, param, value) {
/*
A function which modifies the query string
by setting one parameter to a single value.
Any other instances of parameter will be removed/replaced.
*/
var fragment = encodeURIComponent(param) +
'=' + encodeURIComponent(value);
a.href = url;
if (a.search.length === 0) {
a.search = '?' + fragment;
} else {
var didReplace = false,
// Remove leading '?'
parts = a.search.substring(1)
// Break into pieces
.split('&'),
reassemble = [],
len = parts.length;
for (var i = 0; i < len; i++) {
var pieces = parts[i].split('=');
if (pieces[0] === param) {
if (!didReplace) {
reassemble.push('&' + fragment);
didReplace = true;
}
} else {
reassemble.push(parts[i]);
}
}
if (!didReplace) {
reassemble.push('&' + fragment);
}
a.search = reassemble.join('&');
}
return a.href;
};

if you want to set multiple parameters at once:
function updateQueryStringParameters(uri, params) {
for(key in params){
var value = params[key],
re = new RegExp("([?&])" + key + "=.*?(&|$)", "i"),
separator = uri.indexOf('?') !== -1 ? "&" : "?";
if (uri.match(re)) {
uri = uri.replace(re, '$1' + key + "=" + value + '$2');
}
else {
uri = uri + separator + key + "=" + value;
}
}
return uri;
}
same function as #amateur's
if jslint gives you an error add this after the for loop
if(params.hasOwnProperty(key))

There are a lot of awkward and unnecessarily complicated answers on this page. The highest rated one, #amateur's, is quite good, although it has a bit of unnecessary fluff in the RegExp. Here is a slightly more optimal solution with cleaner RegExp and a cleaner replace call:
function updateQueryStringParamsNoHash(uri, key, value) {
var re = new RegExp("([?&])" + key + "=[^&]*", "i");
return re.test(uri)
? uri.replace(re, '$1' + key + "=" + value)
: uri + separator + key + "=" + value
;
}
As an added bonus, if uri is not a string, you won't get errors for trying to call match or replace on something that may not implement those methods.
And if you want to handle the case of a hash (and you've already done a check for properly formatted HTML), you can leverage the existing function instead of writing a new function containing the same logic:
function updateQueryStringParams(url, key, value) {
var splitURL = url.split('#');
var hash = splitURL[1];
var uri = updateQueryStringParamsNoHash(splitURL[0]);
return hash == null ? uri : uri + '#' + hash;
}
Or you can make some slight changes to #Adam's otherwise excellent answer:
function updateQueryStringParameter(uri, key, value) {
var re = new RegExp("([?&])" + key + "=[^&#]*", "i");
if (re.test(uri)) {
return uri.replace(re, '$1' + key + "=" + value);
} else {
var matchData = uri.match(/^([^#]*)(#.*)?$/);
var separator = /\?/.test(uri) ? "&" : "?";
return matchData[0] + separator + key + "=" + value + (matchData[1] || '');
}
}

This should serve the purpose:
function updateQueryString(url, key, value) {
var arr = url.split("#");
var url = arr[0];
var fragmentId = arr[1];
var updatedQS = "";
if (url.indexOf("?") == -1) {
updatedQS = encodeURIComponent(key) + "=" + encodeURIComponent(value);
}
else {
updatedQS = addOrModifyQS(url.substring(url.indexOf("?") + 1), key, value);
}
url = url.substring(0, url.indexOf("?")) + "?" + updatedQS;
if (typeof fragmentId !== 'undefined') {
url = url + "#" + fragmentId;
}
return url;
}
function addOrModifyQS(queryStrings, key, value) {
var oldQueryStrings = queryStrings.split("&");
var newQueryStrings = new Array();
var isNewKey = true;
for (var i in oldQueryStrings) {
var currItem = oldQueryStrings[i];
var searchKey = key + "=";
if (currItem.indexOf(searchKey) != -1) {
currItem = encodeURIComponent(key) + "=" + encodeURIComponent(value);
isNewKey = false;
}
newQueryStrings.push(currItem);
}
if (isNewKey) {
newQueryStrings.push(encodeURIComponent(key) + "=" + encodeURIComponent(value));
}
return newQueryStrings.join("&");
}

By using jQuery we can do like below
var query_object = $.query_string;
query_object["KEY"] = "VALUE";
var new_url = window.location.pathname + '?'+$.param(query_object)
In variable new_url we will have new query parameters.
Reference: http://api.jquery.com/jquery.param/

I wanted something that:
Uses the browser's native URL API
Can add, update, get, or delete
Expects the query string after the hash e.g. for single page applications
function queryParam(options = {}) {
var defaults = {
method: 'set',
url: window.location.href,
key: undefined,
value: undefined,
}
for (var prop in defaults) {
options[prop] = typeof options[prop] !== 'undefined' ? options[prop] : defaults[prop]
}
const existing = (options.url.lastIndexOf('?') > options.url.lastIndexOf('#')) ? options.url.substr(options.url.lastIndexOf('?') + 1) : ''
const query = new URLSearchParams(existing)
if (options.method === 'set') {
query.set(options.key, options.value)
return `${options.url.replace(`?${existing}`, '')}?${query.toString()}`
} else if (options.method === 'get') {
const val = query.get(options.key)
let result = val === null ? val : val.toString()
return result
} else if (options.method === 'delete') {
query.delete(options.key)
let result = `${options.url.replace(`?${existing}`, '')}?${query.toString()}`
const lastChar = result.charAt(result.length - 1)
if (lastChar === '?') {
result = `${options.url.replace(`?${existing}`, '')}`
}
return result
}
}
// Usage:
let url = 'https://example.com/sandbox/#page/'
url = queryParam({
url,
method: 'set',
key: 'my-first-param',
value: 'me'
})
console.log(url)
url = queryParam({
url,
method: 'set',
key: 'my-second-param',
value: 'you'
})
console.log(url)
url = queryParam({
url,
method: 'set',
key: 'my-second-param',
value: 'whomever'
})
console.log(url)
url = queryParam({
url,
method: 'delete',
key: 'my-first-param'
})
console.log(url)
const mySecondParam = queryParam({
url,
method: 'get',
key: 'my-second-param',
})
console.log(mySecondParam)
url = queryParam({
url,
method: 'delete',
key: 'my-second-param'
})
console.log(url)

Yeah I had an issue where my querystring would overflow and duplicate, but this was due to my own sluggishness. so I played a bit and worked up some js jquery(actualy sizzle) and C# magick.
So i just realized that after the server has done with the passed values, the values doesn't matter anymore, there is no reuse, if the client wanted to do the same thing evidently it will always be a new request, even if its the same parameters being passed. And thats all clientside, so some caching/cookies etc could be cool in that regards.
JS:
$(document).ready(function () {
$('#ser').click(function () {
SerializeIT();
});
function SerializeIT() {
var baseUrl = "";
baseUrl = getBaseUrlFromBrowserUrl(window.location.toString());
var myQueryString = "";
funkyMethodChangingStuff(); //whatever else before serializing and creating the querystring
myQueryString = $('#fr2').serialize();
window.location.replace(baseUrl + "?" + myQueryString);
}
function getBaseUrlFromBrowserUrl(szurl) {
return szurl.split("?")[0];
}
function funkyMethodChangingStuff(){
//do stuff to whatever is in fr2
}
});
HTML:
<div id="fr2">
<input type="text" name="qURL" value="http://somewhere.com" />
<input type="text" name="qSPart" value="someSearchPattern" />
</div>
<button id="ser">Serialize! and go play with the server.</button>
C#:
using System.Web;
using System.Text;
using System.Collections.Specialized;
public partial class SomeCoolWebApp : System.Web.UI.Page
{
string weburl = string.Empty;
string partName = string.Empty;
protected void Page_Load(object sender, EventArgs e)
{
string loadurl = HttpContext.Current.Request.RawUrl;
string querySZ = null;
int isQuery = loadurl.IndexOf('?');
if (isQuery == -1) {
//If There Was no Query
}
else if (isQuery >= 1) {
querySZ = (isQuery < loadurl.Length - 1) ? loadurl.Substring(isQuery + 1) : string.Empty;
string[] getSingleQuery = querySZ.Split('?');
querySZ = getSingleQuery[0];
NameValueCollection qs = null;
qs = HttpUtility.ParseQueryString(querySZ);
weburl = qs["qURL"];
partName = qs["qSPart"];
//call some great method thisPageRocks(weburl,partName); or whatever.
}
}
}
Okay criticism is welcome (this was a nightly concoction so feel free to note adjustments). If this helped at all, thumb it up, Happy Coding.
No duplicates, each request as unique as you modified it, and due to how this is structured,easy to add more queries dynamicaly from wthin the dom.

Develop Reference

JavaScript is the programming language of the Web.

adding object key and value to URL Query - javascript

Related

how to change url parameter value in browser [duplicate]

How to remove some parameters from an URL string?

How can I put all the URL parameters in array of objects using jQuery?

javascript / jquery modify query string parameter

How can I add or update a query string parameter?

Categories

Resources