Как сделать в привязке конкатинацию строки и условие?

Question

[ABCquestion]

Parser Error: Unexpected token Lexer Error: Unexpected character [`] at column 28 in expression [ eventData?.initiatorStd ? `(${eventData?.initiatorStd})`: '' ] at column 29 in [{{ eventData?.initiatorName ?? 'нет данных' }} {{ eventData?.initiatorStd ? `(${eventData?.initiatorStd})`: '' }})]

<code> <div class="header-text">{{ eventData?.initiatorName ?? 'нет данных' }}
        {{ eventData?.initiatorStd ? `(${eventData?.initiatorStd})` : '' }})</div></code>