Deleting an element from HTML using jQuery

In the midst of creating a system that allows users to construct their own navigation structure, I have encountered a stumbling block. The idea is that when a user lands on the site, they are presented with a list of available topics from which they can choose. Selecting a topic triggers the creation of an accordion containing all the relevant content. Should the user click on the same topic again, the accordion should disappear. Unfortunately, the current code setup is failing to achieve this functionality. Can anyone offer guidance?

Here is the Javascript code snippet:

$("a.navlink").click(function(ev) {
        var url = $(this).attr("href")
        var id = $(this).attr("id")
        ev.preventDefault();
        if(!$(this).hasClass('saved')) {
            //$("a.navlink").addClass('active')
                $.ajax ({
                    url: url,
                    type: "POST",
                    data: "method=add&id="+id,
                    success: function (html) {
                        $('#accordion').accordion('destroy');
                        $("#accordion").append(html);
                        $('#accordion').accordion({
                            //active: 0,
                            header:'h2.'+id,
                            collapsible:true
                        });
                    $("a.navlink").addClass('saved');
                    }
                });
        } else if($("a.navlink").hasClass('saved')) {
            $.ajax ({
                url: url,
                type: "POST",
                data: "method=delete",
                success: function (html) {
                    $("a.navlink").removeClass('saved');
                    //$("."+id).remove();
                }
            });    
        }
    });

The following HTML/PHP script generates the accordion:

    <?php
var_dump($_POST);
if(isset($content)) {
    foreach($category_name as $k => $v) {
        echo "<h2 class=".$this->input->post('id')."><a href='#'>$v[category_name]</a></h2>";
        echo "<div class='$v[category_name]'>";
    }
    $replace = array(".", "png", "gif", "jpg");
    $count = 0;
    foreach($content as $k=>$v) {
    $count ++;
    $image_name = str_replace($replace, "", $v['image_name']);
    echo "<a class='contentlink' href='index.php/home/get_content_abstract/$v[content_id]'>";
    echo "<img src='/media/uploads/".strtolower($v['category_name'])."/".$image_name."_thumb.png' alt='This is the picture' />";
    echo "</a>";
    }
    echo "</div>";
//die(var_dump($content));
}

if(isset($favourites_category)) {
    //die(var_dump($favourites));
    echo "<h2 class=".$this->input->post('id')."><a href='#'>$favourites_category</a></h2>";
    $count = 0;
    $replace = array(".", "png", "gif", "jpg");
    foreach ($favourites as $row) {
        $count ++;
        $image_name = str_replace($replace, "", $row['image_name']);
        echo "<div class='$favourites_category'>";
        echo "<a class='contentlink' href='index.php/home/get_content_abstract/$row[content_id]'>";
        echo "<img src='/media/uploads/".strtolower($row['category_name'])."/".$image_name."_thumb.png' alt='This is the picture' />";
        echo "<a/>";
        echo "</div>";
    }
}
?>

To clarify, I am seeking a solution to uniquely identify each created accordion and ensure that clicking its associated link removes it from the screen.

Answer №1

The issue here lies in the callback function having a different context from the ajax call. Your variables id and url are not accessible within your callbacks. To rectify this, you can pass them through the ajax call so they can be used in the callback. Additionally, make sure that the response is JSON and not HTML.

Another problem is using $("a.navlink") (which refers to the first a.navlink) instead of $(this) in some instances, like the else if statement.

Here is an updated code snippet, but please provide more clarity on what you are trying to achieve:

$("a.navlink").click(function(ev) {
  var url = $(this).attr("href")
  var id = $(this).attr("id")
  ev.preventDefault();
  if(!$(this).hasClass('saved')) {
    //$("a.navlink").addClass('active')
    $.ajax ({
      url: url,
      type: "POST",
      data: {method: 'add', id: id},
      dataType: "json",
      success: function (response) {
        //vars url and id are not accessible here
        //so it needs to be returned from the ajax call
        $('#accordion').accordion('destroy');
        $("#accordion").append(response.html);
        $('#accordion').accordion({
          //active: 0,
          header:'h2',
          collapsible:true
        });
        $("#" + response.id).addClass('saved');
      }
    });
  } else if($(this).hasClass('saved')) {
    $.ajax ({
      url: url,
      type: "POST",
      data: {method: 'delete', id: id},
      dataType: "json",
      success: function (response) {
        $("#" + response.id).removeClass('saved');
        $("h2." + response.id).remove();
      }
    });    
  }
});

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