How do I parse a URL query parameters, in Javascript?
Possible Duplicate:
Use the get paramater of the url in javascript
Get query string values in JavaScript
In Javascript, how can I get the parameters of a URL string (not the current URL)?
like:
www.domain.com/?v=123&p=hello
Can I get "v" and "p" in a JSON object?
Today (2.5 years after this answer) you can safely use Array.forEach . As @ricosrealm suggests, decodeURIComponent was used in this function.
function getJsonFromUrl() {
var query = location.search.substr(1);
var result = {};
query.split("&").forEach(function(part) {
var item = part.split("=");
result[item[0]] = decodeURIComponent(item[1]);
});
return result;
}
actually it's not that simple , see the peer-review in the comments, especially:
Maybe this should go to codereview SE, but here is safer and regexp-free code:
function getJsonFromUrl(hashBased) {
var query;
if(hashBased) {
var pos = location.href.indexOf("?");
if(pos==-1) return [];
query = location.href.substr(pos+1);
} else {
query = location.search.substr(1);
}
var result = {};
query.split("&").forEach(function(part) {
if(!part) return;
part = part.split("+").join(" "); // replace every + with space, regexp-free version
var eq = part.indexOf("=");
var key = eq>-1 ? part.substr(0,eq) : part;
var val = eq>-1 ? decodeURIComponent(part.substr(eq+1)) : "";
var from = key.indexOf("[");
if(from==-1) result[decodeURIComponent(key)] = val;
else {
var to = key.indexOf("]",from);
var index = decodeURIComponent(key.substring(from+1,to));
key = decodeURIComponent(key.substring(0,from));
if(!result[key]) result[key] = [];
if(!index) result[key].push(val);
else result[key][index] = val;
}
});
return result;
}
I also replaced non-encoded + for space according to this article which is also useful guide how to encode adhering to RFC 3986.
Note the result[key][index] = val : a new array item is created, it is enumerable, so it can be iterated by forEach call. Therefore, you can parse even URLs like
var url = "?foo%20e[]=a%20a&foo+e[%5Bx%5D]=b&foo e[]=c";
// {"foo e": ["a a", "c", "[x]":"b"]}
var obj = getJsonFromUrl(url)["foo e"];
for(var key in obj) { // Array.forEach would skip string keys here
console.log(key,":",obj[key]);
}
/*
0 : a a
1 : c
[x] : b
*/
You could get a JavaScript object (a map) of the parameters with something like this:
var regex = /[?&]([^=#]+)=([^&#]*)/g,
url = window.location.href,
params = {},
match;
while(match = regex.exec(url)) {
params[match[1]] = match[2];
}
The regular expression could quite likely be improved. It simply looks for name-value pairs, separated by = characters, and pairs themselves separated by & characters (or an = character for the first one). For your example, the above would result in:
{v: "123", p: "hello"}
Here's a working example.
var v = window.location.getParameter('v');
var p = window.location.getParameter('p');
现在v和p分别是123和hello的对象
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