<script>
var value = "hello world";
// or overwrite value in your callback function ...
this.scope.mdown = function() { return "1"; }
this.scope.mup = function() { return "0"; }
this.scope.mleave = function() { return "0"; }
</script>
<md-button class="vibrate filled touched bigfont rounded"
    style="background-color:#c0392b"
    ng-mousedown="send({payload:mdown()})"
    ng-mouseup="send({payload:mup()})"
    ng-mouseleave="send({payload:mleave()})">
    <i class="fa fa-repeat" aria-hidden="true"></i>
    CW<br/>button
</md-button>