. Replace content of menu-dropdown to add an ID on the username DIV
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<meta name="replace" content=".menu-dropdown">
<div class="menu-dropdown" ng-class="{open: menuShown}"
ng-click="toggleMenu()">
<div id=" USERNAMEDIV'" class="menu-title">{{menuTitle}}</div>
<div class="menu-indicator"></div>
<!-- Menu contents -->
<div class="menu-contents" ng-transclude></div>
</div>
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. Then you can access this variable by jquery.
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$('#USERNAMEDIV').html()
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. Don't forget that all variable used on the client side can be
hack. You shouldn't use those variable for security.