How to install react in code
在code中安装react的方法:首先安装好vscode;然后使用npm安装“create-react-app”;接着通过“create-react-app my-app”命令创建一个React项目;最后运行npm start进行检测即可。
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visual studio code + react 开发环境搭建
开发环境 windows
开发工具 visual studio code
node 安装和 npm
windows 安装node 可以直接在 node官网 直接下载直接当作普通软件安装即可。
安装完成可以在控制台中运行node测试是否安装成功 win + r 输入 cmd
,直接在终端输入node -v
输出版本号及已经成功安装。
目前新版本的node自带npm(npm 是随同 node 一起安装的包管理工具)。这里安装好了 node并且测试安装成功之后,可以继续在控制台输入 npm -v
检查是不是安装成功。同样成功会输出版本号。
安装 visual studio code
vs code 正常软件安装 没有需要注意的,直接下载安装(https://code.visualstudio.com/)
安装React
参照文档 React JavaScript Tutorial in VS Code (https://code.visualstudio.com/docs/nodejs/reactjs-tutorial)文档已经很详细 按照文档来一遍就基本上没问题。
- 创建本地文件夹,即保存项目的文件夹,在文件夹下打开控制台我这里使用git bash直接在文件夹下右键找到git bash启动即可
- 在控制台输入
npm install -g create-react-app
使用npm安装 create-react-app - 安装完 create-react-app 之后 继续输入
create-react-app my-app
来创建一个项目my-app
是创建出来的 React 项目,等待一段时间(这里需要下载一些依赖包),即可看到创建完成的整个文件结构 - 切换控制台目录到项目目录下 运行
npm start
检测当前项目是否创建成功 正常情况下当输入命令之后 会直接打开默认浏览器预览 http://localhost:3000/ 此时会看到一个react的页面
至此新建的React项目已经可以正常运行了
5.用VS Code 打开项目文件夹,这里可以看到整个文件结构
所有文件都可以直接使用VS Code直接修改。
安装 Debugger for Chrome
- VS Code 提供 Debugger for Chrome 插件 可以支持使用chrome内核debug。
直接搜索 安装 之后重新加载一次VS Code
2.使用Debugger for Chrome 进行debug 需要对项目进行额外的配置
在此处设置启动配置,文档原文中所说的会创建一个新的launch.json
,我这里已经存在一个launch.json
文件则直接在里面添加配置即可,这里有一个添加配置的按钮可以直接添加配置节点 ,注意这里有两个chrome相关节点一个Launch 一个 Attach
创建完两个节点 之后 找到 "request": "launch"
的一个节点里面有一个url将这个url设置为之前 React 项目启动的url,即 http://localhost:3000/
另一个配置节点默认即可如有问题再做修改,修改后的全部配置如下:
{ // 使用 IntelliSense 了解相关属性。 // 悬停以查看现有属性的描述。 // 欲了解更多信息,请访问: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "type": "chrome", "request": "attach", "name": "Attach to Chrome", "port": 9222, "webRoot": "${workspaceFolder}" }, { "type": "chrome", "request": "launch", "name": "chrome", "url": "http://localhost:3000", "webRoot": "${workspaceFolder}" }, { "type": "node", "request": "launch", "name": "node", "program": "${workspaceFolder}\\start" } ]}
启动项目
npm start
然后打开debug工具栏
选择之前添加的 chrome 节点启动 ,此时会打开一个新的chrome页面Find the
index.js
file in the project source code, put a breakpoint, left-click in front of the line number, and then refresh the page, you can enter the endpoint
Now you can simply debug.
Install eslint
eslint is a compilable JavaScript and JSX inspection tool. Can be used to check specification code for syntax errors.
- Enter in the console
npm install -g eslint
Install eslint - Install the eslint plug-in through VS Code
- Open the command panel of VS Code and find it directly in the view or
Ctrl Shift P
Enter ESLint to find the option to create the.eslintrc.json
file. At this time, a configuration file will be created in the project root directory. At this time, some grammatical errors in your project will be automatically detected
#There are also rules for configuring semicolons in the reference document, you can add them if needed.
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