use like this:
getQueryVariable("foo")
To get variables in urls eg:
http://foo.com/index.html?foo=bar
If you want to support arrays, check the version by @atk below:
use like this:
getQueryVariable("foo")
To get variables in urls eg:
http://foo.com/index.html?foo=bar
If you want to support arrays, check the version by @atk below:
function(a){ | |
return RegExp("[&?]"+a+"=([^&]+)").exec(location)[1] | |
} | |
//searches the url (location) | |
//finds the text after a "&" or a "?" followed by the variable name, followed by a "=" | |
//and before another "&" |
function(a){return RegExp("[&?]"+a+"=([^&]+)").exec(location)[1]} | |
//If you want to support arrays (Thanks atk!) | |
function(a){for(var b=[],c,d=eval('/[&?]'+a+'(\\[])?=([^&]+)/g');c=d.exec(location);)b.push(c[2]);return b} |
{ | |
"name": "getQueryVariable", | |
"description": "Get variables in urls", | |
"keywords": [ | |
"url", | |
"query", | |
"string", | |
"variable", | |
"get" | |
] | |
} |
<script> | |
getQueryVariable = function(a){return RegExp("[&?]"+a+"=([^&]+)").exec(location)[1]} | |
document.write(getQueryVariable("foo")) | |
</script> |
@williammalo: we live and learn :-)
What about using split with regex?
The original code did, but exec is much smaller.
What about supporting array values (e.g. x[]=1&x[]=2
)?
@FarSeeing
I'm sorry but I have no idea what you mean by that.
@williammalo
The current version throws an error, if you try to search for array parameters:
// location = 'http://example.com?a=1&b[]=2&b[]=3'
getQueryVariable = function(a){return RegExp("[&?]"+a+"=([^&]+)").exec(location)[1]}
getQueryVariable( 'a' ); // "1", correct
getQueryVariable( 'b' ); // TypeError: RegExp("[&?]" + a + "=([^&]+)").exec(txt) is null
getQueryVariable( 'b[]' ); // TypeError: RegExp("[&?]" + a + "=([^&]+)").exec(txt) is null
A version which supports array:
function(a,b,c){with(eval('/[&?]'+a+'(\\[])?=([^&]+)/g'))for(b=[];c=exec(location);)b.push(c[2]);return b}
Those TypeErrors can be caught with a (...||0)[1] construct as in my proposal.
@tsaniel
If you can make a version without "with" I'll update my function. (I have withophobia)
Only 1 char longer:
function(a){for(var b=[],c,d=eval('/[&?]'+a+'(\\[])?=([^&]+)/g');c=d.exec(location);)b.push(c[2]);return b}
@atk
Great! it works perfectly! (I think...)
I'll put it in my gist!
Thanks!
If you have an anchor on url like param=value#anchor it returns the value like value#anchor, you just need to add one more byte to the code to works =D
function url(a){for(var b=[],c,d=eval('/[&?]'+a+'([])?=([^&^#]+)/g');c=d.exec(location);)b.push(c[2]);return b}
@atk
Wow! I made a stupid mistake there =P
That code is very smart!
I didn't know that exec can reference stuff in parentheses! What a noob I am!