已经安装的
npm install -g cnpm
cnpm@4.5.0
2017.3.28
npm install -g vue
以前安装的 npm install -g vue@2.1.6
似乎安装失败，第1次尝试：
似乎安装失败，第2次尝试： 
常用命令
看已经安装了的：
npm list
效果
C:UsersXiaoCong
+-- UNMET PEER DEPENDENCY @angular/common@^2.3.1 || ^4.0.0
+-- UNMET PEER DEPENDENCY @angular/core@^2.3.1 || ^4.0.0
+-- UNMET PEER DEPENDENCY @angular/forms@^2.3.1 || ^4.0.0
+-- @ng-bootstrap/ng-bootstrap@1.0.0-alpha.22
+-- bootstrap@4.0.0-alpha.6 invalid
| +-- jquery@3.2.1 extraneous
| `-- tether@1.4.0 extraneous
+-- create-react-app@1.3.0
| +-- chalk@1.1.3
| | +-- ansi-styles@2.2.1
| | +-- escape-string-regexp@1.0.5
| | +-- has-ansi@2.0.0
| | | `-- ansi-regex@2.1.1
| | +-- strip-ansi@3.0.1
| | `-- supports-color@2.0.0
| +-- commander@2.9.0
| | `-- graceful-readlink@1.0.1
| +-- cross-spawn@4.0.2
| | +-- lru-cache@4.0.2
| | | +-- pseudomap@1.0.2
| | | `-- yallist@2.1.2
| | `-- which@1.2.14
| | `-- isexe@2.0.0
| +-- fs-extra@1.0.0
| | +-- graceful-fs@4.1.11
| | +-- jsonfile@2.4.0
| | `-- klaw@1.3.1
| +-- hyperquest@2.1.2
| | +-- buffer-from@0.1.1
| | | `-- is-array-buffer-x@1.1.0
| | | +-- has-to-string-tag-x@1.1.0
| | | | `-- has-symbol-support-x@1.1.0
| | | +-- is-object-like-x@1.1.0
| | | | +-- is-function-x@1.1.0
| | | | `-- is-primitive@2.0.0
| | | `-- to-string-tag-x@1.1.0
| | | +-- lodash.isnull@3.0.0
| | | `-- validate.io-undefined@1.0.3
| | +-- duplexer2@0.0.2
| | | `-- readable-stream@1.1.14
| | | `-- isarray@0.0.1
| | `-- through2@0.6.5
| | +-- readable-stream@1.0.34
| | `-- xtend@4.0.1
| +-- semver@5.3.0
| +-- tar-pack@3.4.0
| | +-- debug@2.6.3
| | | `-- ms@0.7.2
| | +-- fstream@1.0.11
| | | +-- inherits@2.0.3
| | | `-- mkdirp@0.5.1
| | | `-- minimist@0.0.8
| | +-- fstream-ignore@1.0.5
| | | `-- minimatch@3.0.3
| | | `-- brace-expansion@1.1.6
| | | +-- balanced-match@0.4.2
| | | `-- concat-map@0.0.1
| | +-- once@1.4.0
| | | `-- wrappy@1.0.2
| | +-- readable-stream@2.2.6
| | | +-- buffer-shims@1.0.0
| | | +-- core-util-is@1.0.2
| | | +-- isarray@1.0.0
| | | +-- process-nextick-args@1.0.7
| | | +-- string_decoder@0.10.31
| | | `-- util-deprecate@1.0.2
| | +-- rimraf@2.6.1
| | | `-- glob@7.1.1
| | | +-- fs.realpath@1.0.0
| | | +-- inflight@1.0.6
| | | `-- path-is-absolute@1.0.1
| | +-- tar@2.2.1
| | | `-- block-stream@0.0.9
| | `-- uid-number@0.0.6
| +-- tmp@0.0.31
| | `-- os-tmpdir@1.0.2
| `-- validate-npm-package-name@3.0.0
| `-- builtins@1.0.3
+-- element-ui@1.2.5
| +-- async-validator@1.6.8
| +-- babel-helper-vue-jsx-merge-props@2.0.2
| +-- deepmerge@1.3.2
| `-- throttle-debounce@1.0.1
`-- UNMET PEER DEPENDENCY vue@^2.1.6
npm ERR! peer dep missing: @angular/core@^2.3.1 || ^4.0.0, required by @ng-bootstrap/ng-bootstrap@1.0.0-alpha.22
npm ERR! peer dep missing: @angular/common@^2.3.1 || ^4.0.0, required by @ng-bootstrap/ng-bootstrap@1.0.0-alpha.22
npm ERR! peer dep missing: @angular/forms@^2.3.1 || ^4.0.0, required by @ng-bootstrap/ng-bootstrap@1.0.0-alpha.22
npm ERR! peer dep missing: vue@^2.1.6, required by element-ui@1.2.5
npm ERR! invalid: bootstrap@4.0.0-alpha.6 C:UsersXiaoCong
ode_modulesootstrap
npm ERR! extraneous: jquery@3.2.1 C:UsersXiaoCong
ode_modulesjquery
npm ERR! extraneous: tether@1.4.0 C:UsersXiaoCong
ode_modules ether