On this page I used next code:

    <div>
        <button id="withoutZone">3 handlers without Zonejs</button>
        <button id="withZone">3 handlers with Zonejs</button>
    </div>

    <script>
        withoutZone.addEventListener('click', () => {
            console.error('[without Zone]: handler 1.');
            throw new Error('Error from first handler without Zonejs');
        });
        withoutZone.addEventListener('click', () => {
            console.error('[without Zone]: handler 2.');
        });
        withoutZone.addEventListener('click', () => {
            console.error('[without Zone]: handler 3.');
        });
    </script>

    <script type="text/javascript" src="https://unpkg.com/zone.js"></script>
    <script>
        withZone.addEventListener('click', () => {
            console.error('[with Zone]: handler 1.', Zone.current);
            throw new Error('Error from first handler with Zonejs');
        });
        withZone.addEventListener('click', () => {
            console.error('[with Zone]: handler 2.');
        });
        withZone.addEventListener('click', () => {
            console.error('[with Zone]: handler 3.');
        });
    </script>
        

Result buttons (look into console for logs from event handlers):

3 handlers without Zonejs 3 handlers with Zonejs