一些線上測試react的平台
Repl.it – Online React Editor and IDE – Fast, Powerful, Free
The online code editor for web apps. Powered by Visual Studio Code. – StackBlitz
CodeSandbox: Online Code Editor Tailored for Web Application Development
Learn to Code with Interactive Tutorials | Scrimba
其實在local端測試就可以了，可是遇到問題的話，做成線上版才方便問問題哈哈