wl01927173:都係伺服器連線失敗 Console咁樣寫
Download the React DevTools and use an HTTP server (instead of a file: URL) for a better development experience: ht-tps://fb.me/react-devtools
(program):1 Warning: Accessing PropTypes via the main React package is deprecated, and will be removed in React v16.0. Use the latest available v15.* prop-types package from npm instead. For info on usage, compatibility, migration and more, see ht-tps://fb.me/prop-types-docs
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