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    Building a Tree of UI Components in React with Children or with Self-closing tags


    You can reuse your custom react components multiple times and build them into a tree of components like this:

    <Greeting />
      <Greeting />

    Notice that the <div> tag contains the Greeting tag as a child, but the Greeting tag contains no children - so it requires the trailing slash (/>) so it can be a "self closing" tag