Change button behavior according to URL

Question

How can I change the behavior of a button according to the URL? I have the following URL, e.g.:

site.com/search/hill climbing machine

the button would be something to filter according to the price, being crescent or decreasing.

Example with decreasing "DESC" (highest price)

URL:

site.com/search/hill climbing machine ?filter=desc

The button being the bet of the URL:

<a href="site.com/search/maquina de subir ladeira?filter=asc">Filtrar por menor preço</a>

or, for increasing values:

Example with increasing "ASC" (lowest price)

site.com/search/hill climbing machine ?filter=asc

<a href="site.com/search/maquina de subir ladeira?filter=desc">Filtrar por maior preço</a>

standard behavior (no filter ? filter in URL) "filter for lower price"

Answer 1

I guess that’s what you’re looking for:

$(document).ready(function(){
    var get = document.URL;
    if(get.match(/filter=asc/i)){
       //Faz isso
    }
    else if(get.match(/filter=desc/i)){
       //Faz aquilo
    }
    else{
       //Faz outra  coisa
    }
});