I have URL like this:
http://localhost/PMApp/temp.htm?ProjectID=462
What I need to do is to get the details after the ? sign (query string) - that is ProjectID=462. How can I get that using JavaScript?
What I've done so far is this:
var url = window.location.toString();
url.match(?);
I don't know what to do next.
Have a look at the MDN article about window.location.
The QueryString is available in window.location.search.
If you want a more convenient interface to work with, you can use the searchParams property of the URL interface, which returns a URLSearchParams object. The returned object has a number of convenient methods, including a get-method. So the equivalent of the above example would be:
let params = new URL(document.location.toString()).searchParams;
let name = params.get("name");
The URLSearchParams interface can also be used to parse strings in a querystring format, and turn them into a handy URLSearchParams object.
let paramsString = "name=foo&age=1337"
let searchParams = new URLSearchParams(paramsString);
searchParams.has("name") === true; // true
searchParams.get("age") === "1337"; // true
The URLSearchParams interface is now widely adopted in browsers (95%+ according to Can I Use), but if you do need to support legacy browsers as well, you can use a polyfill.
encodeURIComponent/decodeURIComponent instead of escape/unescapegetQueryStringValue for legacy browsers, doesn't work for ?foo=bar&foo1=bar1 If we try to fetch value for foo, it returns empty string.
const params = (new URL(url)).searchParams; works for me.Use window.location.search to get everything after ? including ?
Example:
var url = window.location.search;
url = url.replace("?", ''); // remove the ?
alert(url); //alerts ProjectID=462 is your case
let querystring = window.location.search.substring(1);decodeURI(window.location.search)
.replace('?', '')
.split('&')
.map(param => param.split('='))
.reduce((values, [ key, value ]) => {
values[ key ] = value
return values
}, {})
If you happened to use Typescript and have dom in your the lib of tsconfig.json, you can do:
const url: URL = new URL(window.location.href);
const params: URLSearchParams = url.searchParams;
// get target key/value from URLSearchParams object
const yourParamValue: string = params.get('yourParamKey');
// To append, you can also leverage api to avoid the `?` check
params.append('newKey', 'newValue');
You can use this for direct find value via params name.
const urlParams = new URLSearchParams(window.location.search);
const myParam = urlParams.get('myParam');
You can simply use URLSearchParams().
Lets see we have a page with url:
https://example.com/?product=1&category=gameOn that page, you can get the query string using window.location.search and then extract them with URLSearchParams() class.
const params = new URLSearchParams(window.location.search)
console.log(params.get('product')
// 1
console.log(params.get('category')
// game
Another example using a dynamic url (not from window.location), you can extract the url using URL object.
const url = new URL('https://www.youtube.com/watch?v=6xJ27BtlM0c&ab_channel=FliteTest')
console.log(url.search)
// ?v=6xJ27BtlM0c&ab_channel=FliteTest
This is a simple working snippet:
const urlInput = document.querySelector('input[type=url]')
const keyInput = document.querySelector('input[name=key]')
const button = document.querySelector('button')
const outputDiv = document.querySelector('#output')
button.addEventListener('click', () => {
const url = new URL(urlInput.value)
const params = new URLSearchParams(url.search)
output.innerHTML = params.get(keyInput.value)
})div {
margin-bottom: 1rem;
}<div>
<label>URL</label> <br>
<input type="url" value="https://www.youtube.com/watch?v=6xJ27BtlM0c&ab_channel=FliteTest">
</div>
<div>
<label>Params key</label> <br>
<input type="text" name="key" value="v">
</div>
<div>
<button>Get Value</button>
</div>
<div id="output"></div>This will add a global function to access to the queryString variables as a map.
// -------------------------------------------------------------------------------------
// Add function for 'window.location.query( [queryString] )' which returns an object
// of querystring keys and their values. An optional string parameter can be used as
// an alternative to 'window.location.search'.
// -------------------------------------------------------------------------------------
// Add function for 'window.location.query.makeString( object, [addQuestionMark] )'
// which returns a queryString from an object. An optional boolean parameter can be
// used to toggle a leading question mark.
// -------------------------------------------------------------------------------------
if (!window.location.query) {
window.location.query = function (source) {
var map = {};
source = source || this.search;
if ("" != source) {
var groups = source, i;
if (groups.indexOf("?") == 0) {
groups = groups.substr(1);
}
groups = groups.split("&");
for (i in groups) {
source = groups[i].split("=",
// For: xxx=, Prevents: [xxx, ""], Forces: [xxx]
(groups[i].slice(-1) !== "=") + 1
);
// Key
i = decodeURIComponent(source[0]);
// Value
source = source[1];
source = typeof source === "undefined"
? source
: decodeURIComponent(source);
// Save Duplicate Key
if (i in map) {
if (Object.prototype.toString.call(map[i]) !== "[object Array]") {
map[i] = [map[i]];
}
map[i].push(source);
}
// Save New Key
else {
map[i] = source;
}
}
}
return map;
}
window.location.query.makeString = function (source, addQuestionMark) {
var str = "", i, ii, key;
if (typeof source == "boolean") {
addQuestionMark = source;
source = undefined;
}
if (source == undefined) {
str = window.location.search;
}
else {
for (i in source) {
key = "&" + encodeURIComponent(i);
if (Object.prototype.toString.call(source[i]) !== "[object Array]") {
str += key + addUndefindedValue(source[i]);
}
else {
for (ii = 0; ii < source[i].length; ii++) {
str += key + addUndefindedValue(source[i][ii]);
}
}
}
}
return (addQuestionMark === false ? "" : "?") + str.substr(1);
}
function addUndefindedValue(source) {
return typeof source === "undefined"
? ""
: "=" + encodeURIComponent(source);
}
}
Enjoy.
You can use this function, for split string from ?id=
function myfunction(myvar){
var urls = myvar;
var myurls = urls.split("?id=");
var mylasturls = myurls[1];
var mynexturls = mylasturls.split("&");
var url = mynexturls[0];
alert(url)
}
myfunction(window.top.location.href);
myfunction("http://www.myname.com/index.html?id=dance&emp;cid=in_social_facebook-hhp-food-moonlight-influencer_s7_20160623");
here is the fiddle
window.location.href.slice(window.location.href.indexOf('?') + 1);
8 years later, for a one-liner
const search = Object.fromEntries(new URLSearchParams(location.search));
Down-side, it does NOT work with IE11
To explain
// For https://caniuse.com/?search=fromEntries
> Object.fromEntries(new URLSearchParams(location.search))
> {search: "fromEntries"}
You can use the search property of the window.location object to obtain the query part of the URL. Note that it includes the question mark (?) at the beginning, just in case that affects how you intend to parse it.
You should take a look at the URL API that has helper methods to achieve this in it as the URLSearchParams: https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams
This is not currently supported by all modern browsers, so don't forget to polyfill it (Polyfill available using https://qa.polyfill.io/).
var queryObj = {};
if(url.split("?").length>0){
var queryString = url.split("?")[1];
}
now you have the query part in queryString
First replace will remove all the white spaces, second will replace all the '&' part with "," and finally the third replace will put ":" in place of '=' signs.
queryObj = JSON.parse('{"' + queryString.replace(/"/g, '\\"').replace(/&/g, '","').replace(/=/g,'":"') + '"}')
So let say you had a query like abc=123&efg=456. Now before parsing, your query is being converted into something like {"abc":"123","efg":"456"}. Now when you will parse this, it will give you your query in json object.
Convert that into array then split with '?'
var url= 'http://localhost/PMApp/temp.htm?ProjectID=462';
url.split('?')[1]; //ProjectID=462
q={};location.search.replace(/([^?&=]+)=([^&]+)/g,(_,k,v)=>q[k]=v);q;
Try this one
/**
* Get the value of a querystring
* @param {String} field The field to get the value of
* @param {String} url The URL to get the value from (optional)
* @return {String} The field value
*/
var getQueryString = function ( field, url ) {
var href = url ? url : window.location.href;
var reg = new RegExp( '[?&]' + field + '=([^&#]*)', 'i' );
var string = reg.exec(href);
return string ? string[1] : null;
};
Let’s say your URL is http://example.com&this=chicken&that=sandwich. You want to get the value of this, that, and another.
var thisOne = getQueryString('this'); // returns 'chicken'
var thatOne = getQueryString('that'); // returns 'sandwich'
var anotherOne = getQueryString('another'); // returns null
If you want to use a URL other than the one in the window, you can pass one in as a second argument.
var yetAnotherOne = getQueryString('example', 'http://another-example.com&example=something'); // returns 'something'
I think it is way more safer to rely on the browser than any ingenious regex:
const parseUrl = function(url) {
const a = document.createElement('a')
a.href = url
return {
protocol: a.protocol ? a.protocol : null,
hostname: a.hostname ? a.hostname : null,
port: a.port ? a.port : null,
path: a.pathname ? a.pathname : null,
query: a.search ? a.search : null,
hash: a.hash ? a.hash : null,
host: a.host ? a.host : null
}
}
console.log( parseUrl(window.location.href) ) //stacksnippet
//to obtain a query
console.log( parseUrl( 'https://example.com?qwery=this').query )
This will return query parameters as an associative array
var queryParams =[];
var query= document.location.search.replace("?",'').split("&");
for(var i =0; i< query.length; i++)
{
if(query[i]){
var temp = query[i].split("=");
queryParams[temp[0]] = temp[1]
}
}
If you can't use libraries, URLSearchParams is not available and you are looking for a pure js solution, check this:
function getQueryParams(url) {
const re = /(\w+)=([^\s&]+)/g;
let dict = {}, m;
while ((m = re.exec(url))) {
dict[m[1]] = m[3] || m[2];
}
return dict;
}
Usage
console.log(getQueryParams("http://localhost:5000/admin/repository?name=acme-web&bbb=ccc"));
Result
{ name: 'asp-web', bbb: 'ccc' }
function getQueryParams(url) {
const re = /(\w+)=([^\s&]+)/g;
let dict = {}, m;
while ((m = re.exec(url))) {
dict[m[1]] = m[3] || m[2];
}
return dict;
}
console.log(getQueryParams("http://localhost:5000/admin/repository?name=acme-web&bbb=ccc"))
For React Native, React, and For Node project, below one is working
yarn add query-string
import queryString from 'query-string';
const parsed = queryString.parseUrl("https://pokeapi.co/api/v2/pokemon?offset=10&limit=10");
console.log(parsed.offset) will display 10
var url = window.location.toString(); url.match(?);.
location.search