Npm Start

React state is like the memory of a React component. It allows a component to keep track of information that might change over time, and when state changes, React automatically re-renders the component to reflect those changes. What is React State? State is an object that stores data or information about the component. Think of it like variables for your component, but with one big difference: when the state updates, React re-renders the component so the UI stays in sync with the data.

6-5 web3浏览器链接区块链（调用读写合约与metamask联动） 这里就是浏览器端和智能合约的交互 两个库 Web3 Truffle contract //truffle在链接前端合约简单包了一层，比较好用 来到react项目的根目录下（在第一章进行了创建）， 这里重新创建一个react项目 https://blog.csdn.net/u012118993/article/details/87288516 react创建新项目 使用creat-react-app快速新建一个react项目 （1）npm install -g create-react-app 全局安装（安装到整体） （2）create-react-app reactproject 新建并对react项目进行命名（注:项目名称不能有大写） （3）cd reactproject 通过命令进入文件夹内部，准备运行项目 （4）npm start 运行项目 E:\truffle\woniu-pet-shop 在truffle目录下创建 在react的项目下安装下面的文件 安装web3（安装到文件夹下面） npm...

Angular is a development platform for building WEB, mobile and desktop applications using HTML, CSS and TypeScript (JavaScript). Currently, Angular is at version 13 and Google is the main maintainer of the project. GitHub is a source code and file storage service with version control using git tool. GitHub Actions is a service to automate the software workflow. Amazon S3 (Simple Storage Service) is an object storage service offering scalability, data availability, security and performance.