由于某些原因不能调用函数-对脚本使用localStorage

Question

我试图做的是控制台记录脚本中未读消息的数量。规则是:如果聊天窗口被最小化，在收到消息时添加一个，当聊天窗口最大化时，将计数设置为零。所有存储为持久化，因此页面重新加载或导航不会更改计数。这是我的剧本。

      count = 0;
      let is_minimized = true;

      var chatServiceOptions = {
        license: "*SECRET*", // ie '1234567'
        group: 4, // ie 22,
        customer: {
          name: "Development Account",
          timezone: "Europe/London"
        },
        plugins: [

// this is where the code starts          
          function countAdd() {
                localStorage.count = count++;
              },
//this is just calling the API, when a chat is available          
          function (chatService) {
           chatService.register('ready', function() {

             // when chat window is closed, ensure is_minimized is true
             chatService.events.on('LC_on_chat_window_minimized', data => {
               is_minimized = true
             });

             // when chat window is opened, set is_minimized to false
         chatService.events.on('LC_on_chat_window_opened', data => {
                count = 0    
                is_minimized = false
             });

             chatService.events.on('LC_on_message', function(data) {
               // set the window minimized to a variable 
               var LC_API = LC_API || {};
                  LC_API.on_chat_window_minimized = function() {
                    is_minimized = true;
               };

               // output the data of the incoming/outgoing message
               console.log(data);
               // check that it comes from an agent and the chat window is minimized
               // if it is, add +1 to unread message count
               if (data.user_type ==='agent' && is_minimized == true) {
                countAdd(); } 
               // if its maximized, set unread count to zero
               else { localStorage.count = 0; };

               // display number of unread messages
               console.log('unread messages: ' + localStorage.getItem('count'));
             });
           })
          }
     ],
      };
      var LC_API = LC_API || {};
LC_API.on_message = function(data) {
  console.log(data)
  alert("Message " + data.text + " sent by " + data.user_type);
};
    </script>

控制台给了我：

Uncaught : countAdd未定义为

Answer 1

您需要首先定义countAdd和其他函数，然后将它们传递到插件数组中。由于您是内联地定义它们，所以第二个函数不知道countAdd

function countAdd() { }
function otherFn() {
  // uses countAdd in here
}

var chatServiceOptions = {
  license: "*SECRET*", // ie '1234567'
  group: 4, // ie 22,
  customer: {
    name: "Development Account",
    timezone: "Europe/London"
  },
  // provide both functions to the plugins property
  plugins: [countAdd, otherFn]
}