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Add note about Promise polyfill for React.lazy (#1556)

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* Add note about Promise polyfill for React.lazy

Fixes #1552

* Backticks
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Alex Krolick
2019-01-15 10:11:28 -08:00
committed by GitHub
parent 60dd46d64b
commit 165ae047b4
1 changed files with 4 additions and 0 deletions
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content/docs/reference-react.md
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@@ -310,6 +310,10 @@ const SomeComponent = React.lazy(() => import('./SomeComponent'));
Note that rendering `lazy` components requires that there's a `<React.Suspense>` component higher in the rendering tree. This is how you specify a loading indicator.
> **Note**
>
> Using `React.lazy`with dynamic import requires Promises to be available in the JS environment. This requires a polyfill on IE11 and below.
### `React.Suspense`
`React.Suspense` let you specify the loading indicator in case some components in the tree below it are not yet ready to render. Today, lazy loading components is the **only** use case supported by `<React.Suspense>`: