matomo/plugins/CoreAdminHome/templates/whatIsNew.twig

<div vue-directive="CoreHome.ContentIntro">
    <h2>{{ 'CoreAdminHome_WhatIsNewTitle'|translate }}</h2>
</div>
<div class="whatisnew">

    <div class="whatisnew-changelist">

    {% for change in changes %}

        <div class="card">
            <div class="card-content">
                <span style="float: left; font-size:32px; color:#3450A3; margin-right:10px" class="icon-new_releases"></span>
                {% if change.plugin_name == "CoreHome" or change.plugin_name == "ProfessionalServices"%}
                    <h2 class="card-title">{{ change.title }}</h2>
                {% else %}
                    <h2 class="card-title">{{ change.plugin_name }} - {{ change.title }}</h2>
                {% endif %}
                {{ change.description | raw }}
                {% if not change.link is empty and not change.link_name is empty %}
                <p>
                    <br>
                    <a class="change-link" href="{{ change.link }}" target="_blank" rel="noopener">{{ change.link_name }}</a>
                </p>
                {% endif %}
            </div>
        </div>

    {% endfor %}

    </div>

    <button href="javascript:void 0;" class="btn whatisnew-btn whatisnew-remind-me-later" onclick="Piwik_Popover.close()"
       title="{{ 'CoreAdminHome_WhatIsNewRemindMeLater'|translate|e('html_attr') }}">{{ 'CoreAdminHome_WhatIsNewRemindMeLater'|translate|e('html_attr') }}
    </button>

    <button href="javascript:void 0;" class="btn whatisnew-btn whatisnew-do-not-show-again" onclick="doNotShowAgain()"
       title="{{ 'CoreAdminHome_WhatIsNewDoNotShowAgain'|translate|e('html_attr') }}">{{ 'CoreAdminHome_WhatIsNewDoNotShowAgain'|translate|e('html_attr') }}
    </button>

</div>

 <script>
     function doNotShowAgain() {
        var ajaxRequest = new ajaxHelper();
        ajaxRequest.addParams({
            module: 'API',
            method: 'CoreAdminHome.whatIsNewMarkAllChangesReadForCurrentUser',
            format: 'json'
        }, 'get');
        ajaxRequest.withTokenInUrl();
        ajaxRequest.setFormat('json');
        ajaxRequest.setCallback(function() {
            var link = document.querySelector('a[onclick*="CoreAdminHome&action=whatIsNew"] > .badge-menu-item');
            if (link) {
                link.style.display = "none";
            }
            var icon = document.querySelector('a[onclick*="CoreAdminHome&action=whatIsNew"] > .navbar-icon');
            if (icon) {
                icon.classList.remove('icon-notifications_on');
                icon.classList.add('icon-reporting-actions');
            }
            Piwik_Popover.close();
        });
        ajaxRequest.useCallbackInCaseOfError()
        ajaxRequest.send();
     }
</script>