add parameter to links on page using jquery

Question

How do I add let's say something like ajax=1 to all links on my page with jquery. I will also need to check if the url has existing parameters. for example "http://mysite.com/index.php?pl=132" will have to become "http://mysite.com/index.php?pl=132&ajax=1" Also, if the link does not have any parameters, for example "http://mysite.com/index.php", it will become "http://mysite.com/index.php?ajax=1" I want to load the jquery script on document ready so all links are changed on page load.

Thanks.

Answer 1

You could do something like this:

$(function() {
   $("a").attr('href', function(i, h) {
     return h + (h.indexOf('?') != -1 ? "&ajax=1" : "?ajax=1");
   });
});

On document.ready this looks at every <a>, looks at it's href, if it contains ? already it appends &ajax=1 if it doesn't, it appends ?ajax=1.

Answer 2

Like this:

$(function() {
    $('a[href]').attr('href', function(index, href) {
        var param = "key=value";

        if (href.charAt(href.length - 1) === '?') //Very unlikely
            return href + param;
        else if (href.indexOf('?') > 0)
            return href + '&' + param;
        else
            return href + '?' + param;
    });
})

Answer 3

If you're interested in plugins, there's the jQuery Query String Object. This will allow you simple checking of parameters in the querystring, and if necessary the ability to add more, remove some, or edit others.

Answer 4

Taking what is above, this is the best way to concatenate parameters to links.

Also avoid link with href like href="Javascript:YourFunction();"

$(function(){                                      
   var myRandom = getRandom();       
   $('a[href]').each(function(i){
        var currHref = $(this).attr("href");
        var isAfunction = currHref.substring(0,10);              
        if(isAfunction == "javascript"){                
            $(this).attr("href",currHref);
        }else{
            if (currHref.charAt(currHref.length - 1) === '?')                           
                $(this).attr("href",currHref);
            else if (currHref.indexOf('?') > 0)                
                $(this).attr("href",currHref+"&rand="+getRandom());
            else                  
                $(this).attr("href",currHref+"?rand="+getRandom());
        }
   });               
});
function getRandom(){
    var randomnumber = Math.floor(Math.random()*10000); 
    return randomnumber;
}