mac 安装webpack之-bash: webpack: command not found

1、用npm的方式安装，首先你要安装node.js,地址 https://nodejs.org/en/download/下载安装

安装 Node.js 和npm

双击该文件，无脑下一步即可。安装成功后，是这样的：

2、安装完看有没有安装成功，看下版本,打开终端输入：node -v【查看node版本】、npm -v【查看npm版本】

xxxx-Pro:~ xf$ node -v

v8.9.1

xxxx-Pro:~ xf$ npm -v

6.1.0

4、全局安装webpack

法一：、在终端里输入： sudo -s 回车，输入你的开机密码回车 ,再执行

npm install webpack-cli -g

法二：

(注意mac安装需要sudo权限，否则有问题)

xxxx-Pro:demo1 xf$ sudo npm install webpack-cli -g
Password:
/usr/local/bin/webpack-cli -> /usr/local/lib/node_modules/webpack-cli/bin/cli.js
npm WARN [email protected] requires a peer of webpack@^4.x.x but none is installed. You must install peer dependencies yourself.
+ [email protected]

added 105 packages from 49 contributors in 14.398s

注意：虽然安装成功了，但是在命令行输入webpack -v,提示一下错误

-bash:webpack:command not found

网站找了很少解决办法，都不成功。最后决定使用nvm管理node包。因为初学的时候都是通过安装包的形式安装node，需要配置很多环境路径。

安装Nvm

1、卸载安装包的node，以及node_modules

卸载已安装到全局的 node/npm
如果之前是在官网下载的 node 安装包，运行后会自动安装在全局目录，其中 node 命令在 /usr/local/bin/node，npm 命令在全局 node_modules 目录中，具体路径为 /usr/local/lib/node_modules/npm
安装 nvm 之前最好先删除下已安装的 node 和全局 node 模块

npm ls -g --depth=0 # 查看已经安装在全局的模块，以便删除这些全局模块后再按照不同的 node 版本重新进行全局安装
sudo rm -rf /usr/local/lib/node_modules # 删除全局 node_modules 目录
sudo rm /usr/local/bin/node # 删除 node
cd  /usr/local/bin && ls -l | grep "../lib/node_modules/" | awk '{print $9}'| xargs rm # 删除全局 node 模块注册的软链

2、访问github的nvm，获取命令行

点击打开链接

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash

xxxxxx-Pro:bin xf$ curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash

% Total % Received % Xferd Average Speed Time Time Time Current

Dload Upload Total Spent Left Speed

100 12819 100 12819 0 0 13977 0 --:--:-- --:--:-- --:--:-- 13964

=> Downloading nvm from git to '/Users/xf/.nvm'

=> Cloning into '/Users/xf/.nvm'...

remote: Counting objects: 267, done.

remote: Compressing objects: 100% (242/242), done.

remote: Total 267 (delta 31), reused 86 (delta 15), pack-reused 0

Receiving objects: 100% (267/267), 119.47 KiB | 47.00 KiB/s, done.

Resolving deltas: 100% (31/31), done.

=> Compressing and cleaning up git repository

=> Appending nvm source string to /Users/xf/.bash_profile

=> Appending bash_completion source string to /Users/xf/.bash_profile

=> Close and reopen your terminal to start using nvm or run the following to use it now:

export NVM_DIR="$HOME/.nvm"

[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm

[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion

nvm自己会往我们的环境变量添加,如果你是mac电脑。可以通过一下命令去查看

vim ~/.bash_profile

但是此时命令还没有完全生效，我们需要执行

source ~/.bash_profile

全局安装webpack

xxxx-Pro:~ xf$ npm install webpack -g

出现success表示安装成功：

/Users/xf/.nvm/versions/node/v10.4.1/bin/webpack -> /Users/xf/.nvm/versions/node/v10.4.1/lib/node_modules/webpack/bin/webpack.js

> [email protected] install /Users/xf/.nvm/versions/node/v10.4.1/lib/node_modules/webpack/node_modules/fsevents

> node install

[fsevents] Success: "/Users/xf/.nvm/versions/node/v10.4.1/lib/node_modules/webpack/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node" already installed

Pass --update-binary to reinstall or --build-from-source to recompile

+ [email protected]

added 389 packages from 299 contributors in 58.518s

命令行输入webpack -v,出现版本号表示安装成功

xxxx-Pro:~ xf$ webpack -v

4.12.0