Found the correct code

/**
 * Apophis Software Component for OSSN v. 6.1.
 *
 * @package   Apophis Software MarkNotification
 * @author    Apophis Software
 * @copyright (C) Apophis Software
 * @license   Open Source Social Network License (OSSN LICENSE)  http://www.opensource-socialnetwork.org/licence
 * @link      https://www.apophissoftware.com/
 */
// <script>
Ossn.register_callback('ossn', 'init', 'MarkNotification_js_init');
function MarkNotification_js_init(){

    $(document).ready(function(){
        $('body').delegate('.apop-notif-read', 'click', function(){
            var $guid = $(this).attr('data-guid');
        });
        $('body').delegate('.apop-notif-delete', 'click', function(){
            var $guid = $(this).attr('data-guid');
        });
    });
}

function mnInstant(type, guid) {
    let xhr = new XMLHttpRequest();

    if (type == 1) {
        let url = Ossn.site_url + "action/mark/delete?guid=" + guid.toString();
        url = Ossn.AddTokenToUrl(url);

        xhr.open('PUT', url, true);
        xhr.setRequestHeader("Content-Type", "application/json")
        xhr.send(null);

        Ossn.trigger_message(Ossn.Print('mark:notification:delete:success'), 'success');
        Ossn.NotificationsCheck();
    }

    if (type == 2) {
        let url = Ossn.site_url + "action/mark/read?guid=" + guid.toString();
        url = Ossn.AddTokenToUrl(url);

        xhr.open('PUT', url, true);
        xhr.setRequestHeader("Content-Type", "application/json")
        xhr.send(null);

        Ossn.trigger_message(Ossn.Print('mark:notification:read:success'), 'success');
        Ossn.NotificationsCheck();
    }
}

I hope that the developer is optimizing it

Enter the directory system/plugins/default/javascripts/libraries
and browse ossn.lib.languages.php and ossn.lib.messageboxes.php
to find the actually existing functions you wanted to use.

You cannot just create your own meaningful function name and call it. Of course, the function must actually exist.

You cannot add translations because it's hard coded in

/MarkNotification/plugins/default/js/marknotif.php

function mnInstant(type, guid) {
    let xhr = new XMLHttpRequest();

    if (type == 1) {
        let url = Ossn.site_url + "action/mark/delete?guid=" + guid.toString();
        url = Ossn.AddTokenToUrl(url);

        xhr.open('PUT', url, true);
        xhr.setRequestHeader("Content-Type", "application/json")
        xhr.send(null);

        Ossn.trigger_message('Notification has been deleted. You may have to refresh to see it removed.','success' );
        Ossn.NotificationsCheck();
    }

    if (type == 2) {
        let url = Ossn.site_url + "action/mark/read?guid=" + guid.toString();
        url = Ossn.AddTokenToUrl(url);

        xhr.open('PUT', url, true);
        xhr.setRequestHeader("Content-Type", "application/json")
        xhr.send(null);

        Ossn.trigger_message('Notification has been Marked Read. You may have to refresh to see it changed.','success' );
        Ossn.NotificationsCheck();
    }
}

Can you replace the code so the translation via locale file is possible?

Or can someone help me how to do it?

I tried with

ossn_trigger_message(ossn_print('mark:notification:read:success'));

But then I don't get any success message at all

Can someone help?

I get this error:

[23-Apr-2023 11:46:02 UTC] PHP WARNING: 2023-04-23 11:46:02 (UTC): "Undefined array key "guid"" in file
/home/queermeet/public_html/components/MarkNotification/actions/delnotif.php
(line 12)

DO YOU KNOW IF THERE IS A FIX FOR THIS YET AS WOULD LIKE TO GET RID OF THEM ALL

This is an example of notifications that don't get deleted "out of the box" with this component. Have not attempted to bug fix this yet, I imagine it's just because Videos/group/event haven't been tagged as an item to receive the action button. Thanks for your hard work!

Just tried 6.1.2.0, and the logic appears still strange to me. This screenshot shows two groupies of mine:

• Honey, who liked a photo some days ago. This notification has been marked already as read and because of that it is no longer part of popup on the right
• Botox, who just added a fresh comment. And this noticfiation is in fact still unread.

Nevertheless, I get the same 'Mark Read' link in both cases - I would expect to get it with Botox, only.

As seen in the image below, only the first notification goes through the templating process, as defined in view.php. (I copied over the original into my component so that I could modify it.)

@Hugo -- Thank you! I added it in.

@Michael -- thank you for the direction! This task, is proving to be difficult. Mainly, because I realized that I had to put the controls into the block to be removed. I surrounded it by a <div id="notif-$guid"> so that I can remove all of it (rather than having the notification gone, and the controls to delete / mark read sitting there pointing at nothing). <-- that mostly works, because some notifications don't get templated?! (don't get it).