Select2 onchange选择选项，然后根据选项追加或删除网址

Question

Currently I have a select dropdown filter setup via php like this:

<?php if($this->config->get("config_show_tmall_only")){?>
  <?php if(isset($code) && $code=="tmall"){?>
  <select id="tmallFilter">
    <option value="&code=tmall">Tmall only</option>
    <option value="">Taobao &amp; Tmall</option>
  </select>
  <?php }else{?>
  <select id="tmallFilter">
    <option value="">Taobao &amp; Tmall</option>
    <option value="&code=tmall">Tmall only</option>
  </select>
  <?php }?>
<?php }?>

It detects if &code=tmall is in the url and runs the first block

I am appending &code=tmall through this script that runs exactly how I need

$('#tmallFilter').bind('change', function () {
    var brwsr_url=document.URL;
    var redirecturl= brwsr_url + $(this).val();
    location.href = redirecturl;
});

The problem I am running into is when i need to go back to Taobao & Tmall I can only add to the url, not strip characters based on that select.

Is there any way I can strip &code=tmall from the url when I select the Taobao & Tmall option?

Answer 1

This is to strip away &code=tmall specifically using String.replace:

$('#tmallFilter').bind('change', function () {
    var brwsr_url = document.URL;
    var redirecturl= brwsr_url.replace(/&code=tmall/, '') + $(this).val();
    location.href = redirecturl;
});