Display Fallbacks with React.Suspense

The fallback prop

Firstly, the Suspense component on the React object was named “Placeholder". This is a very accurate description of the task it fulfills: it acts like a placeholder for components that have not yet been rendered and displays alternative content in the meantime. These placeholders can take many forms. They can be a message that parts of the application are still being loaded or take the form of a loading animation. The placeholder we want to display is passed to Suspense in the fallback prop, and must be defined. Any valid React element can be used and passed as a prop. Strings like the following are also valid:

<Suspens

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