小编shm*_*mow的帖子

我对node.js和它的插件都比较新,所以这可能是一个初学者问题.

我试图在Web服务器上获得一个简单的HTML页面连接到运行带有websocket.io的node.js的不同服务器.

我的代码看起来像这样:

客户

<script src="socket.io/socket.io.js"></script>
<script>
    // Create SocketIO instance, connect

    var socket = new io.Socket();

    socket.connect('http://127.0.0.1:8080'); 

    // Add a connect listener
    socket.on('connect',function() {
      console.log('Client has connected to the server!');
    });
    // Add a connect listener
    socket.on('message',function(data) {
      console.log('Received a message from the server!',data);
    });
    // Add a disconnect listener
    socket.on('disconnect',function() {
      console.log('The client has disconnected!');
    });

    // Sends a message to the server via sockets
    function sendMessageToServer(message) {
      socket.send(message);
    };
</script>

服务器端

// Require HTTP module (to start …

当通过angular-cli（ng test -cc）运行具有代码覆盖率的测试时，因果报应抛出以下错误。罪魁祸首似乎是伊斯坦布尔代码覆盖率模块，因为在没有-cc的情况下运行测试不会导致任何错误。

错误（我用***替换了本地路径）：

at Object.exports.default (***\node_modules\istanbul-instrumenter-loader\dist\index.js:25:16),Module build failed: SyntaxError: 'import' and 'export' may appear only with 'sourceType: "module"' (1:0)
    at Parser.pp$5.raise (***\node_modules\babylon\lib\index.js:4454:13)
    at Parser.pp$1.parseStatement (***\node_modules\babylon\lib\index.js:1881:16)
    at Parser.parseStatement (***\node_modules\babylon\lib\index.js:5910:22)
    at Parser.pp$1.parseBlockBody (***\node_modules\babylon\lib\index.js:2268:21)
    at Parser.pp$1.parseTopLevel (***\node_modules\babylon\lib\index.js:1778:8)
    at Parser.parse (***\node_modules\babylon\lib\index.js:1673:17)
    at Object.parse (***\node_modules\babylon\lib\index.js:7305:37)
    at Instrumenter.instrumentSync (***\node_modules\istanbul-lib-instrument\dist\instrumenter.js:121:31)
    at Instrumenter.instrument (***\node_modules\istanbul-lib-instrument\dist\instrumenter.js:176:32)
    at Object.exports.default (***\node_modules\istanbul-instrumenter-loader\dist\index.js:25:16)
    at Compiler.compiler.plugin (***\node_modules\@angular\cli\plugins\karma-webpack-throw-error.js:10:23)
    at Compiler.applyPlugins (***\node_modules\tapable\lib\Tapable.js:61:14)
    at Watching._done (***\node_modules\webpack\lib\Compiler.js:92:17)
    at onCompiled (***\node_modules\webpack\lib\Compiler.js:51:17)
    at ***\node_modules\webpack\lib\Compiler.js:494:13
    at next (***\node_modules\tapable\lib\Tapable.js:202:11)
    at Compiler.<anonymous> (***\node_modules\webpack\lib\CachePlugin.js:62:5)
    at Compiler.applyPluginsAsyncSeries (***\node_modules\tapable\lib\Tapable.js:206:13)
    at ***\node_modules\webpack\lib\Compiler.js:491:10
    at Compilation.applyPluginsAsyncSeries (***\node_modules\tapable\lib\Tapable.js:195:46) …