React: Positioning, Stacking Context, and Portals are all available in React. We need Portals to escape the "clipping" of content when rendering elements inside elements with. The real thing is not yet available, so let's just teleport components in the DOM for now.
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CSS: absolute positioningAbsolute is not that absoluteUnderstanding Stacking ContextPosition: fixed. Escape the overflowStacking Context in real appsHow can React Portal solve thisReact lifecycle, re-renders, Context, and PortalsCSS, native JavaScript, form submit, and Portals7 Comments
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