问Node-Red UI模板:如何“修复”变量的值？

EN

<div>{{value}}</div><br>

<md-button ng-click="send({payload:action()})">
    Click me to send a message
</md-button>

<script>
(function(scope) {
  scope.$watch('msg', function(msg) {
    if (msg.payload) {
	  scope.value = msg.payload;
	}
  scope.action = function() {
    return scope.value;
    }
  });
})(scope);
</script>

[{"id":"3f23f703.42bea8","type":"ui_template","z":"66b95f66.704eb","group":"b95933b3.c8423","name":"","order":0,"width":"6","height":"3","format":"<div>{{value}}</div><br>\n\n<md-button ng-click=\"send({payload:action()})\">\n    Click me to send a message\n</md-button>\n\n<script>\n(function(scope) {\n  scope.$watch('msg', function(msg) {\n    if (msg.payload) {\n\t  scope.value = msg.payload;\n\t}\n  scope.action = function() {\n    return scope.value;\n    }\n  });\n})(scope);\n</script>","storeOutMessages":true,"fwdInMessages":false,"templateScope":"local","x":320,"y":1440,"wires":[["2c92bfb9.3b913"]]},{"id":"2c92bfb9.3b913","type":"debug","z":"66b95f66.704eb","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":490,"y":1440,"wires":[]},{"id":"52897833.650b18","type":"inject","z":"66b95f66.704eb","name":"","topic":"","payload":"boat","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":1440,"wires":[["3f23f703.42bea8"]]},{"id":"b4427fff.dd20b","type":"inject","z":"66b95f66.704eb","name":"","topic":"","payload":"house","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":1480,"wires":[["3f23f703.42bea8"]]},{"id":"505e7106.a90bc","type":"inject","z":"66b95f66.704eb","name":"","topic":"","payload":"car","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":1520,"wires":[["3f23f703.42bea8"]]},{"id":"f0f33fe9.21da5","type":"inject","z":"66b95f66.704eb","name":"","topic":"","payload":"500","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":1560,"wires":[["3f23f703.42bea8"]]},{"id":"f857f83f.7d2108","type":"function","z":"66b95f66.704eb","name":"test msg","func":"var servers = {\n    host: 'localhost',\n    port: 6680,\n};\nreturn [servers];","outputs":1,"noerr":0,"x":320,"y":1380,"wires":[["3f23f703.42bea8"]]},{"id":"1ee40d04.3106d3","type":"inject","z":"66b95f66.704eb","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":120,"y":1380,"wires":[["f857f83f.7d2108"]]},{"id":"b95933b3.c8423","type":"ui_group","z":"","name":"Group 2","tab":"f04b5dc7.38763","order":2,"disp":false,"width":"6","collapse":false},{"id":"f04b5dc7.38763","type":"ui_tab","z":"66b95f66.704eb","name":"New Test","icon":"dashboard"}]

`<script>
(function(scope) {
  scope.$watch('msg', function(msg) {
    if (msg.payload.image) {
      localStorage.setItem("image", msg.payload.image);
    }
    if (msg.payload.text) {
      localStorage.setItem("text", msg.payload.text);
    }
    if (msg.payload.volume) {
      localStorage.setItem("volume", msg.payload.volume);
    }
  scope.action = function() { 
  return [value, host];
  }
  scope.image = localStorage.getItem("image");
  scope.text = localStorage.getItem("text");
  scope.volume = localStorage.getItem("volume");
  });
})(scope);
</script>`