我对JS生态系统很陌生，所以请原谅我犯的一些愚蠢错误。 ： - ）
我正在尝试使用Yeoman生成AngularJS应用程序。我这样做但是在做'咕噜咕噜'时我得到的错误是：
Running "serve" task
jit-grunt: Plugin for the "clean" task not found.
If you have installed the plugin already, please setting the static mapping.
See https://github.com/shootaroo/jit-grunt#static-mappings
Warning: Task "clean:server" failed. Use --force to continue.
Aborted due to warnings.
我现在缺少哪个插件，如何安装？
===更新===
按照建议安装grunt-clean后，新错误是：
Running "serve" task
Loading "clean.js" tasks...ERROR
>> TypeError: grunt.registerHelper is not a function
Running "clean:server" (clean) task
Warning: grunt.helper is not a function Use --force to continue.
Aborted due to warnings.
答案 0 :(得分：2)
请运行npm install
因为这将安装package.json