Getting Started with Create React App

Available Scripts

In the project directory, you can run:

yarn start

Runs the app in the development mode.
Open [http://localhost:3000] to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

yarn build

Builds the app for production to the build folder.\

Packages

新增的packages

  "babel-preset-env": "^1.7.0",
  "@babel/register": "^7.12.10",
  "@babel/cli": "^7.8.4",
  "@babel/register": "^7.12.10",
  "@babel/node": "^7.8.4",
   babel-preset-es2015