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Intro to React Portals

  • React Portals provide a way to render content outside the current DOM hierarchy, allowing components to be rendered in a different part of the app's DOM.
  • Portals are created using ReactDOM.createPortal(child, container), which specifies the React element to render and the DOM node where it should be inserted.
  • When to use Portals: Recommended for components like modals, tooltips, popovers, dropdowns, and overlays to escape parent styles, manage focus correctly, and maintain React context.
  • Portals are useful when building custom modals, working on design systems, or dealing with layout/z-index issues, with many existing UI libraries utilizing Portals underneath.

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