employee_react_dev 理解React:体系结构的完整概述。 React是组成较大图片(和显示)的拼图碎片的连接。 它是三角形或倒置的树,其中: 1. app is the top of the triangle. App is where the react routes are. 2. The second level: Pages. Pages are where we display information. In this case we have 1 page--the Home.js - This is where we have states and hooks. - States and hooks are accessible to the child components. Remember, it's almost nested.