A fast interactive unit test runner with built-in support for coverage reporting.

Autoprefixed CSS, so you don’t need -webkit- or other prefixes.

Language extras beyond ES6 like the object spread operator.

React, JSX, ES6, and Flow syntax support.With create-react-app you have following features out of the box.

You can read here to see what everything it does for you. React-scripts start sets up the development environment and starts a server, as well as hot module reloading. create-react-app helps you kick off projects without configuring, so you do not have to setup your project by yourself. Please, upgrade your dependencies to the actual version of core-js.React-scripts is a set of scripts from the create-react-app starter pack. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Npm WARN deprecated is no longer maintained and not recommended for usage due to the number of issues. Npm WARN deprecated Switch to 'npm install joi' Tps://v8.dev/blog/math-random for details. Older versions may use Math.random() in certain circumstances, which is known to be problematic. Please use WARN deprecated Please upgrade to version 7 or higher.

Npm WARN deprecated Moved to 'npm install WARN deprecated This package has been deprecated and is no longer maintained. Npm WARN deprecated babel-eslint is now This package will no longer receive updates. Upgrade to chokidar 3 with 15x less dependencies. Npm WARN deprecated Chokidar 2 will break on node v14+. Npm WARN deprecated some dependency vulnerabilities fixed, support for node < 10 dropped, and newer ECMAScript syntax/features added new code should use the URLSearchParams API instead. Npm WARN deprecated The querystring API is considered Legacy. Npm WARN deprecated This version has been deprecated and is no longer supported or maintained Npm WARN deprecated flatten is deprecated in favor of utility frameworks such as lodash.

Npm react