網上的教程有好多，在這里不一一列舉，我只介紹我今天安裝成功的步驟
首先，在安裝react之前要先配置好node
1.安裝node
在這里下載node的安裝包https://nodejs.org/en/download/ 。我下載的是.pkg文件，直接雙擊安裝就好
node —v命令檢驗是否安裝成功
npm -v用來檢測npm
2.通過npm使用react
國內使用 npm 速度很慢，你可以使用淘寶定制的 cnpm (gzip 壓縮支持) 命令行工具代替默認的 npm:
$ npm install -g cnpm --registry=https://registry.npm.taobao.org $ npm config set registry https://registry.npm.taobao.org
一般這個時候就可以使用cnpm來進行操作，但是我的一直顯示命令未找到。所以我放棄了使用cnpm，繼續使用npm命令
給npm配置taobao鏡像的registry
npm config set registry https://registry.npm.taobao.org
然后直接用
npm install gulp less --save-dev
就是從taobao鏡像拿包了
3.兩種react開發環境構建
使用 create-react-app 快速構建 React 開發環境
create-react-app 是來自於 Facebook，通過該命令我們無需配置就能快速構建 React 開發環境。
create-react-app 自動創建的項目是基於 Webpack + ES6 。
執行以下命令創建項目：
$ cnpm install -g create-react-app $ create-react-app my-app $ cd my-app/ $ npm start
MacOS，安裝npm全局包提示沒有寫入權限：
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
解決方法：
修改npm包所安裝目錄的權限：sudo chown -R $USER /usr/local 然后輸入密碼就可以了
查看目錄是否已切換權限：$ls -l /usr/local
接下來可以進行npm全局包安裝：例如$npm install webpack -g
-----------------------------
安裝問題
123deAir:~ mxt$ npm install create-react-app -g
WARN checkPermissions Missing write access to /usr/local/lib/node_modules
ERR! path /usr/local/lib/node_modules
ERR! code EACCES
ERR! errno -13
ERR! syscall access
ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
ERR! { [Error: EACCES: permission denied, access '/usr/local/lib/node_modules']
ERR! stack:
ERR! 'Error: EACCES: permission denied, access \'/usr/local/lib/node_modules\'',
ERR! errno: -13,
ERR! code: 'EACCES',
ERR! syscall: 'access',
ERR! path: '/usr/local/lib/node_modules' }
npm
ERR! The operation was rejected by your operating system.
ERR! It is likely you do not have the permissions to access this file as the current user
npm
ERR! If you believe this might be a permissions issue, please double-check the
ERR! permissions of the file and its containing directories, or try running
ERR! the command again as root/Administrator (though this is not recommended).
ERR! A complete log of this run can be found in:
ERR! /Users/mxt/.npm/_logs/2018-12-19T09_09_15_552Z-debug.log
123deAir:~ mxt$ npm install -g create-react-app
WARN checkPermissions Missing write access to /usr/local/lib/node_modules
ERR! path /usr/local/lib/node_modules
ERR! code EACCES
ERR! errno -13
ERR! syscall access
ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
ERR! { [Error: EACCES: permission denied, access '/usr/local/lib/node_modules']
ERR! stack:
ERR! 'Error: EACCES: permission denied, access \'/usr/local/lib/node_modules\'',
ERR! errno: -13,
ERR! code: 'EACCES',
ERR! syscall: 'access',
ERR! path: '/usr/local/lib/node_modules' }
npm
ERR! The operation was rejected by your operating system.
ERR! It is likely you do not have the permissions to access this file as the current user
npm
ERR! If you believe this might be a permissions issue, please double-check the
ERR! permissions of the file and its containing directories, or try running
ERR! the command again as root/Administrator (though this is not recommended).
ERR! A complete log of this run can be found in:
ERR! /Users/mxt/.npm/_logs/2018-12-19T09_11_38_006Z-debug.log
123deAir:~ mxt$ sudo npm install webpack -g
Password:
/usr/local/bin/webpack -> /usr/local/lib/node_modules/webpack/bin/webpack.js
> fsevents@1.2.4 install /usr/local/lib/node_modules/webpack/node_modules/fsevents
> node install
[fsevents] Success: "/usr/local/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
+ webpack@4.27.1
added 389 packages from 297 contributors in 30.263s
123deAir:~ mxt$ sudo chown -R $USER /usr/local
123deAir:~ mxt$ ls -l /usr/local
total 0
drwxr-xr-x 6 mxt wheel 204 12 19 01:19 bin
drwxr-xr-x 3 mxt wheel 102 12 10 13:29 include
drwxr-xr-x 73 mxt wheel 2482 12 19 00:28 lib
drwxr-xr-x 5 mxt wheel 170 12 10 13:29 share
123deAir:~ mxt$ sudo chown -R $USER /usr/local
123deAir:~ mxt$ ls -l /usr/local
total 0
drwxr-xr-x 6 mxt wheel 204 12 19 01:19 bin
drwxr-xr-x 3 mxt wheel 102 12 10 13:29 include
drwxr-xr-x 73 mxt wheel 2482 12 19 00:28 lib
drwxr-xr-x 5 mxt wheel 170 12 10 13:29 share
123deAir:~ mxt$ webpack -g
One CLI for webpack must be installed. These are recommended choices, delivered as separate packages:
- webpack-cli (https://github.com/webpack/webpack-cli)
The original webpack full-featured CLI.
We will use "npm" to install the CLI via "npm install -D".
Do you want to install 'webpack-cli' (yes/no): npm install webpack -g
You need to install 'webpack-cli' to use webpack via CLI.
You can also install the CLI manually.
123deAir:~ mxt$ npm install -g create-react-app
/usr/local/bin/create-react-app -> /usr/local/lib/node_modules/create-react-app/index.js
+ create-react-app@2.1.1
added 63 packages from 20 contributors in 8.958s
123deAir:~ mxt$ create-react-app my-app
Creating a new React app in /Users/mxt/my-app.
Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts...
> fsevents@1.2.4 install /Users/mxt/my-app/node_modules/fsevents
> node install
[fsevents] Success: "/Users/mxt/my-app/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
+ react-scripts@2.1.1
+ react-dom@16.6.3
+ react@16.6.3
added 1776 packages from 684 contributors in 120.945s
Success! Created my-app at /Users/mxt/my-app
Inside that directory, you can run several commands:
npm start
Starts the development server.
npm run build
Bundles the app into static files for production.
npm test
Starts the test runner.
npm run eject
Removes this tool and copies build dependencies, configuration files
and scripts into the app directory. If you do this, you can’t go back!
We suggest that you begin by typing:
cd my-app
npm start
Happy hacking!
123deAir:~ mxt$
/////////安裝命令
npm install create-react-app -g // 全局安裝create-react-app，如果不想全局安裝，則不要-g。可能會很慢，可以使用cnpm來安裝 create-react-app my-app // my-app是項目名 cd my-app npm start // 啟動項目
