Add / Change parameter of URL and redirect to the new URL

22

If the &view-all parameter does NOT exist in the URL I need to add it to the end of the URL along with a value. If it DOES exist then I need to be able to just change the value without creating a new URL because it might, or might not, have other parameters before it.

I found this function but I can't get it to work: https://stackoverflow.com/a/10997390/837705

Here is the code I have using the function above (which I can't get to work): http://jsfiddle.net/Draven/tTPYL/4/

I know how to append the parameter and value already:

<div onclick="javascript: window.location.assign(window.location.href+='&view-all=Yes');">Blah Blah</div>

More Info:

If the URL is http://www.domain.com/index.php?action=my_action then the default "&view-all" value would be "Yes" so the URL they would be directed to when they click the button is http://www.domain.com/index.php?action=my_action&view-all=Yes.

If the URL is http://www.domain.com/index.php?action=my_action&view-all=Yes then when they click the button it would change to http://www.domain.com/index.php?action=my_action&view-all=No???

EDIT: Please give me examples. I don't know alot of JS, and I just can't think of a way to do it in PHP.

This question is tagged with javascript jquery append

~ Asked on 2012-10-25 07:41:14

The Best Answer is


65

function setGetParameter(paramName, paramValue)
{
    var url = window.location.href;
    var hash = location.hash;
    url = url.replace(hash, '');
    if (url.indexOf(paramName + "=") >= 0)
    {
        var prefix = url.substring(0, url.indexOf(paramName + "=")); 
        var suffix = url.substring(url.indexOf(paramName + "="));
        suffix = suffix.substring(suffix.indexOf("=") + 1);
        suffix = (suffix.indexOf("&") >= 0) ? suffix.substring(suffix.indexOf("&")) : "";
        url = prefix + paramName + "=" + paramValue + suffix;
    }
    else
    {
    if (url.indexOf("?") < 0)
        url += "?" + paramName + "=" + paramValue;
    else
        url += "&" + paramName + "=" + paramValue;
    }
    window.location.href = url + hash;
}

Call the function above in your onclick event.

~ Answered on 2012-10-25 07:55:44


5

All the preivous solution doesn't take in account posibility of the substring in parameter. For example http://xyz?ca=1&a=2 wouldn't select parameter a but ca. Here is function which goes through parameters and checks them.

function setGetParameter(paramName, paramValue)
{
  var url = window.location.href;
  var hash = location.hash;
  url = url.replace(hash, '');
  if (url.indexOf("?") >= 0)
  {
    var params = url.substring(url.indexOf("?") + 1).split("&");
    var paramFound = false;
    params.forEach(function(param, index) {
      var p = param.split("=");
      if (p[0] == paramName) {
        params[index] = paramName + "=" + paramValue;
        paramFound = true;
      } 
    });
    if (!paramFound) params.push(paramName + "=" + paramValue);
    url = url.substring(0, url.indexOf("?")+1) + params.join("&");
  }
  else
    url += "?" + paramName + "=" + paramValue;
  window.location.href = url + hash;
}

~ Answered on 2016-11-15 14:56:07


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