How to add message as flag?

<script> 
var myFlag = AJS.flag({
    type: 'success',
    body: '<strong>TEST-745</strong> Message.' +
        '<ul class="aui-nav-actions-list">' +
        '<li><a class="aui-button aui-button-link" href="#">Link one</a></li>' +
        '<li><button class="aui-button aui-button-link">Link two</button></li>' +
        '</ul>'
});
</script>