npm是什么意思是“跳过失败的可选依赖项”?

节点和npm的最新版本导致运行业力问题。 当我尝试安装karma-cli npm i -g karma karma-cli我得到以下警告:

 npm WARN optional Skipping failed optional dependency /chokidar/fsevents: npm WARN notsup Not compatible with your operating system or architecture: fsevents@1.0.8 npm WARN optional Skipping failed optional dependency /gulp-karma/chokidar/fsevents: npm WARN notsup Not compatible with your operating system or architecture: fsevents@0.2.1 

而当我尝试运行karma test ,我得到以下错误:

 "C:\Program Files\nodejs\node.exe" "C:\Program Files (x86)\JetBrains\WebStorm 11.0.3\plugins\js-karma\js_reporter\karma-intellij\lib\intellijServer.js" --karmaPackageDir=C:\Users\xxx\AppData\Roaming\npm\node_modules\karma --configFile=C:\Users\xxx\Documents\project\karma.conf.js 26 02 2016 11:24:07.871:WARN [plugin]: Cannot find plugin "karma-chrome-launcher". Did you forget to install it ? npm install karma-chrome-launcher --save-dev 26 02 2016 11:24:07.877:WARN [plugin]: Cannot find plugin "karma-firefox-launcher". Did you forget to install it ? npm install karma-firefox-launcher --save-dev 26 02 2016 11:24:07.878:WARN [plugin]: Cannot find plugin "karma-phantomjs-launcher". Did you forget to install it ? npm install karma-phantomjs-launcher --save-dev 26 02 2016 11:24:07.879:WARN [plugin]: Cannot find plugin "karma-jasmine". Did you forget to install it ? npm install karma-jasmine --save-dev 26 02 2016 11:24:07.880:WARN [plugin]: Cannot find plugin "karma-junit-reporter". Did you forget to install it ? npm install karma-junit-reporter --save-dev 26 02 2016 11:24:07.885:WARN [plugin]: Cannot find plugin "karma-teamcity-reporter". Did you forget to install it ? npm install karma-teamcity-reporter --save-dev 26 02 2016 11:24:07.887:WARN [plugin]: Cannot find plugin "karma-coverage". Did you forget to install it ? npm install karma-coverage --save-dev 26 02 2016 11:24:07.888:WARN [plugin]: Cannot find plugin "karma-jasmine-html-reporter". Did you forget to install it ? npm install karma-jasmine-html-reporter --save-dev 26 02 2016 11:24:07.889:WARN [plugin]: Cannot find plugin "karma-ng-html2js-preprocessor". Did you forget to install it ? npm install karma-ng-html2js-preprocessor --save-dev 26 02 2016 11:24:07.890:WARN [plugin]: Cannot find plugin "karma-browserify". Did you forget to install it ? npm install karma-browserify --save-dev 26 02 2016 11:24:07.893:WARN [preprocess]: Can not load "coverage", it is not registered! Perhaps you are missing some plugin? 26 02 2016 11:24:07.893:WARN [preprocess]: Can not load "ng-html2js", it is not registered! Perhaps you are missing some plugin? 26 02 2016 11:24:07.893:WARN [preprocess]: Can not load "browserify", it is not registered! Perhaps you are missing some plugin? 26 02 2016 11:24:07.901:WARN [reporter]: Can not load "coverage", it is not registered! Perhaps you are missing some plugin? 26 02 2016 11:24:07.901:WARN [reporter]: Can not load "junit", it is not registered! Perhaps you are missing some plugin? C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\node_modules\di\lib\injector.js:9 throw error('No provider for "' + name + '"!'); ^ Error: No provider for "framework:jasmine"! (Resolving: framework:jasmine) at error (C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\node_modules\di\lib\injector.js:22:12) at Object.parent.get (C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\node_modules\di\lib\injector.js:9:13) at get (C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\node_modules\di\lib\injector.js:54:19) at C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\lib\server.js:138:20 at Array.forEach (native) at Server._start (C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\lib\server.js:137:21) at invoke (C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\node_modules\di\lib\injector.js:75:15) at Server.start (C:\Users\xxx\AppData\Roaming\npm\node_modules\karma\lib\server.js:102:18) at Object.<anonymous> (C:\Program Files (x86)\JetBrains\WebStorm 11.0.3\plugins\js-karma\js_reporter\karma-intellij\lib\intellijServer.js:12:13) at Module._compile (module.js:410:26) at Object.Module._extensions..js (module.js:417:10) at Module.load (module.js:344:32) at Function.Module._load (module.js:301:12) at Function.Module.runMain (module.js:442:10) at startup (node.js:136:18) at node.js:966:3 Process finished with exit code 1 

我的configuration规格如下:

节点版本: v4.3.0
NPM版本: 3.7.3

任何帮助将不胜感激修复这一点,我无法获得业力版本安装,我认为它没有正确安装在我的机器。

这不是一个错误。 这是一个警告, fseventsd ,Mac OS特定的,不能在Linux上安装。

没有必要惊慌,需要fsevents的包仍然可以工作 – 这就是为什么它是一个可选的依赖项。

由于许多人对此感到困惑(特别是因为这曾经是一个真正的错误,而不是一个警告),有一个开放的错误,使当前的警告进入一个INFO