Get escaped URL parameter

Question

I m looking for a jQuery plugin that can get URL parameters  and support this search string without outputting the JavaScript error   malformed URI sequence   If there isn t a jQuery plugin that supports this  I need to know how to modify it to support this    search  E6 F8 E5   The value of the URL parameter  when decoded  should be             the characters are Norwegian    I don t have access to the server  so I can t modify anything on it

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function getURLParameter name        return decodeURI           RegExp name                 amp       exec location search     null   1

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You can use the browser native location search property   function getParameter paramName      var searchString   window location search substring 1         i  val  params   searchString split   amp        for  i 0 i lt params length i          val   params i  split           if  val 0     paramName          return unescape val 1                return null      But there are some jQuery plugins that can help you    query-object getURLParam

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Just in case you guys have the url like  localhost index xsp a 1 something and you need to get the param not the hash   var vars       hash  anchor  var q   document URL split      1   if q    undefined       q   q split   amp         for var i   0  i  lt  q length  i             hash   q i  split               anchor   hash 1  split               vars push anchor 0            vars hash 0     anchor 0

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What you really want is the jQuery URL Parser plugin  With this plugin  getting the value of a specific URL parameter  for the current URL  looks like this     url   param  foo      If you want an object with parameter names as keys and parameter values as values  you d just call param   without an argument  like this     url   param      This library also works with other urls  not just the current one     url  http   allmarkedup com sky blue amp grass green   param        myElement   url   param       works with elements that have  src    href  or  action  attributes   Since this is an entire URL parsing library  you can also get other information from the URL  like the port specified  or the path  protocol etc   var url     url  http   allmarkedup com folder dir index html item value    url attr  protocol       returns  http  url attr  path       returns   folder dir index html    It has other features as well  check out its homepage for more docs and examples   Instead of writing your own URI parser for this specific purpose that kinda works in most cases  use an actual URI parser  Depending on the answer  code from other answers can return  null  instead of null  doesn t work with empty parameters   foo  amp bar x   can t parse and return all parameters at once  repeats the work if you repeatedly query the URL for parameters etc    Use an actual URI parser  don t invent your own   For those averse to jQuery  there s a version of the plugin that s pure JS

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urlParam   function name     var results   new RegExp       amp      name         amp        exec top window location href      return  results     null    results 1    0       urlParam  key

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You should not use jQuery for something like this  The modern way is to use small reusable modules through a package-manager like Bower   I ve created a tiny module that can parse the query string into an object  Use it like this      parse the query string into an object and get the property queryString parse unescape location search   search      gt

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Slight modification to the answer by  pauloppenheim   as it will not properly handle parameter names which can be a part of other parameter names   Eg  If you have  appenv   amp   env  parameters  redeaing the value for  env  can pick-up  appenv  value   Fix   var urlParamVal   function  name        var result   RegExp    amp          name            amp       exec location search       return result   decodeURIComponent result 2

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Below is what I have created from the comments here  as well as fixing bugs not mentioned  such as actually returning null  and not  null     function getURLParameter name        return decodeURIComponent  new RegExp      amp      name              amp        amp           exec location search          1  replace     g    20     null

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Based on the 999 s answer    function getURLParameter name        return decodeURIComponent           location search match RegExp      amp    name          amp           null   1               Changes    decodeURI   is replaced with decodeURIComponent       amp   is added at the beginning of the regexp

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Need to add the i parameter to make it case insensitive     function getURLParameter name        return decodeURIComponent         RegExp name                 amp        i   exec location search             1

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There s a lot of buggy code here and regex solutions are very slow  I found a solution that works up to 20x faster than the regex counterpart and is elegantly simple                   param      string      parameter to return the value of           return     string      value of chosen parameter  if found             function get param return this                return this   return this replace     ig      replace    ig          Globally replace illegal chars           var url   window location href                                       Get the URL          var parameters   url substring url indexOf        1  split   amp         Split by  param value           var params                                                           Array to store individual values           for var i   0  i  lt  parameters length  i                if parameters i  search return this           -1                  return parameters i  substring parameters i  indexOf        1  split                return  Parameter not found          console log get param  parameterName       Regex is not the be-all and end-all solution  for this type of problem simple string manipulation can work a huge amount more efficiently  Code source

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After reading all of the answers I ended up with this version with   a second function to use parameters as flags  function getURLParameter name        return decodeURIComponent  new RegExp      amp      name              amp        amp           i   exec location search          1  replace     g    20     null     function isSetURLParameter name        return  new RegExp      amp      name           amp             i   exec location search      null

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jQuery code snippet to get the dynamic variables stored in the url as parameters and store them as JavaScript variables ready for use with your scripts     urlParam   function name       var results   new RegExp      amp      name         amp        exec window location href       if  results  null          return null            else         return results 1     0           example com param1 name amp param2  amp id 6    urlParam  param1       name   urlParam  id              6   urlParam  param2         null    example params with spaces http   www jquery4u com city Gold Coast console log   urlParam  city         output  Gold 20Coast  console log decodeURIComponent   urlParam  city         output  Gold Coast

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lt script type  text javascript  gt  function getURLParameter name            return decodeURIComponent               location search toLowerCase   match RegExp      amp      name            amp              null   1                     lt  script gt    getURLParameter id  or getURLParameter Id  Works the same

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For example   a function which returns value of any parameters variable   function GetURLParameter sParam        var sPageURL   window location search substring 1       var sURLVariables   sPageURL split   amp         for  var i   0  i  lt  sURLVariables length  i                  var sParameterName   sURLVariables i  split               if  sParameterName 0     sParam                        return sParameterName 1                        And this is how you can use this function assuming the URL is    http   example com  technology jquery amp blog jquerybyexample    var tech   GetURLParameter  technology    var blog   GetURLParameter  blog      So in above code variable  tech  will have  jQuery  as value and  blog  variable s will be  jquerybyexample

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This may help    lt script type  text javascript  gt        document  ready function            alert getParameterByName  third                 function getParameterByName name           var url       document URL              count     url indexOf name               sub       url substring count               amper     sub indexOf   amp               if amper     -1                var param   sub split                   return param 1            else              var param   sub substr 0 amper  split                   return param 1                     lt  script gt

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I created a simple function to get URL parameter in JavaScript from a URL like this        58e web viewer html page  17  amp getinfo 33   function buildLinkb param        var val   document URL      var url   val substr val indexOf param         var n parseInt url replace param               alert n 1      buildLinkb  page      OUTPUT  18

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function getURLParameters paramName             var sURL   window document URL toString          if  sURL indexOf       gt  0               var arrParams   sURL split                       var arrURLParams   arrParams 1  split   amp                  var arrParamNames   new Array arrURLParams length          var arrParamValues   new Array arrURLParams length               var i   0         for  i 0 i lt arrURLParams length i                     var sParam    arrURLParams i  split               arrParamNames i    sParam 0           if  sParam 1                     arrParamValues i    unescape sParam 1            else             arrParamValues i     No Value                    for  i 0 i lt arrURLParams length i                             if arrParamNames i     paramName                 alert  Param   arrParamValues i                    return arrParamValues i                                  return  No Parameters Found

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If you don t know what the URL parameters will be and want to get an object with the keys and values that are in the parameters  you can use this   function getParameters       var searchString   window location search substring 1         params   searchString split   amp           hash          if  searchString        return       for  var i   0  i  lt  params length  i          var val   params i  split           hash unescape val 0      unescape val 1          return hash      Calling getParameters   with a url like  posts date 9 10 11 amp author nilbus would return       date     9 10 11     author   nilbus      I won t include the code here since it s even farther away from the question  but weareon net posted a library that allows manipulation of the parameters in the URL too    Blog post  http   blog weareon net working-with-url-parameters-in-javascript  Code  http   pastebin ubuntu com 1163515

[javascript] Get escaped URL parameter

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