我该怎么做这个错误:require('connect')。json()是未定义的

当我inputgulp test ,我得到这个错误: require('connect').json() is undefined. 。 我该怎么办?

详细错误信息如下:

  tianjiedeMacBook-Pro:meiyanapp tianjie$ gulp test /Users/tianjie/meiyanruhua/meiyanapp/node_modules/karma/lib/middleware/runner.js:11 var json = require('connect').json(); ^ TypeError: undefined is not a function at Object.<anonymous> (/Users/tianjie/meiyanruhua/meiyanapp/node_modules/karma/lib/middleware/runner.js:11:31) at Module._compile (module.js:460:26) at Object.Module._extensions..js (module.js:478:10) at Module.load (module.js:355:32) at Function.Module._load (module.js:310:12) at Module.require (module.js:365:17) at require (module.js:384:17) at Object.<anonymous> (/Users/tianjie/meiyanruhua/meiyanapp/node_modules/karma/lib/web-server.js:7:24) at Module._compile (module.js:460:26) at Object.Module._extensions..js (module.js:478:10) 

我是通

npm install karma karma-jasmine karma-phantomjs-launcher --save-dev

我不知道如何解决问题…其实你正试图在连接模块中使用JSON()…错误显示JSON本身undefined,你正在调用使用函数()…?