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javascript - Nodejs - 回调函数仅在存在错误时执行？

问题描述

我正在尝试使用此节点库（https://www.npmjs.com/package/node-wifi）编写一个函数以连接到 wifi 网络，但似乎每当我执行此函数时，除非实际上是错误目前，回调被完全跳过。我可能误解了回调的工作方式，但即使没有检测到错误，它也不应该执行吗？

function ConnectToNetwork(networkName: string, networkPassword: string) {
  // Connect to a network
  wifi.disconnect();
  wifi.connect({ ssid: networkName, password: networkPassword }, function (err) {
    //This is not logged when no error is present
    console.log("callback?");
    if (err) {
      console.log(err);
      console.log("Couldn't connect to network");
      return createFailureWindow();
    }
      //Shouldn't this part of the function be invoked if there is no error?
      UpdateCurrentConnections();
      createSuccessWindow();
      console.log("Connected");

  });
}

标签： javascriptnode.jsfunctioncallbackinvoke

解决方案

您可以尝试断开回调吗？ 

function ConnectToNetwork(networkName: string, networkPassword: string) {
  // Connect to a network
  wifi.disconnect(function(err) {
  if (err) {
    console.log(err);
  }
  console.log("Disconnected");
  wifi.connect({ ssid: networkName, password: networkPassword }, function (err) {
    //This is not logged when no error is present
    console.log("callback?");
    if (err) {
      console.log(err);
      console.log("Couldn't connect to network");
      return createFailureWindow();
    }
      //Shouldn't this part of the function be invoked if there is no error?
      UpdateCurrentConnections();
      createSuccessWindow();
      console.log("Connected");

  });
});
  
}

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