Error: Cannot find module 'core-util-is'

1、错误描述

C:\Users\Administrator>cd cma

C:\Users\Administrator\cma>webpack you.js today.js
C:\Users\Administrator\node_modules\webpack-cli\bin\webpack.js:449
                                throw err;
                                ^

Error: Cannot find module 'core-util-is'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:571:15)
    at Function.Module._load (internal/modules/cjs/loader.js:497:25)
    at Module.require (internal/modules/cjs/loader.js:626:17)
    at require (C:\Users\Administrator\node_modules\v8-compile-cache\v8-compile-
cache.js:159:20)
    at Object.<anonymous> (C:\Users\Administrator\node_modules\_readable-stream@
2.3.6@readable-stream\lib\_stream_readable.js:67:12)
    at Module._compile (C:\Users\Administrator\node_modules\v8-compile-cache\v8-
compile-cache.js:178:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)
    at Module.require (internal/modules/cjs/loader.js:626:17)
    at require (C:\Users\Administrator\node_modules\v8-compile-cache\v8-compile-
cache.js:159:20)
    at Object.<anonymous> (C:\Users\Administrator\node_modules\_readable-stream@
2.3.6@readable-stream\readable.js:12:30)
    at Module._compile (C:\Users\Administrator\node_modules\v8-compile-cache\v8-
compile-cache.js:178:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)
    at Module.require (internal/modules/cjs/loader.js:626:17)
    at require (C:\Users\Administrator\node_modules\v8-compile-cache\v8-compile-
cache.js:159:20)
    at Object.<anonymous> (C:\Users\Administrator\node_modules\[email protected]@
duplexify\index.js:1:76)
    at Module._compile (C:\Users\Administrator\node_modules\v8-compile-cache\v8-
compile-cache.js:178:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)
    at Module.require (internal/modules/cjs/loader.js:626:17)
    at require (C:\Users\Administrator\node_modules\v8-compile-cache\v8-compile-
cache.js:159:20)
    at Object.<anonymous> (C:\Users\Administrator\node_modules\[email protected]@pu
mpify\index.js:3:17)
    at Module._compile (C:\Users\Administrator\node_modules\v8-compile-cache\v8-
compile-cache.js:178:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)
    at Module.require (internal/modules/cjs/loader.js:626:17)
    at require (C:\Users\Administrator\node_modules\v8-compile-cache\v8-compile-
cache.js:159:20)
    at Object.<anonymous> (C:\Users\Administrator\node_modules\[email protected].
0@mississippi\index.js:3:27)
    at Module._compile (C:\Users\Administrator\node_modules\v8-compile-cache\v8-
compile-cache.js:178:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)

C:\Users\Administrator\cma>

2、错误原因

     根据错误提示，应该是缺少了 core-util-is

3、解决办法

     执行安装命令：cnpm install --save core-util-is

C:\Users\Administrator>cnpm install --save core-util-is
√ Installed 1 packages
√ Linked 0 latest versions
√ Run 0 scripts
√ All packages installed (1 packages installed from npm registry, used 262ms, s
peed 3.89kB/s, json 1(1.02kB), tarball 0B)