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@fluentui/react-portal
Advanced tools
A utility component that creates portals compatible with Fluent UI
React Portal components for Fluent UI React
This package contains the Portal
component, which allow consumers to render React portals with Fluent styling and RTL awareness.
Portal
can be used as standalone with any part of a Fluent app. The component should be under a FluentProvider
in the tree to make sure that proper theming and RTL handling is available.
By default Portal
will render content to document body
<FluentProvider>
<Portal>Content rendered by default to Fluent's document.body</Portal>
</FluentProvider>
The mount location of the portal can be customized
const node = document.getElementById('customNode');
<Portal mountNode={node}>Render to a custom node in DOM</Portal>;
Portal
renders React children directly to the default/configured DOM node. Therefore styling should be applied to the children
by users directly.
Out of order DOM elements can be problematic when using 'click outside' event listeners since you cannot rely on element.contains(event.target)
because the Portal
elements are out of DOM order.
const outerButtonRef = React.useRef();
const innerButtonRef = React.useRef();
<Portal>
<div>
<button ref={outerButtonRef}> Outer button </button>
<Portal>
<div>
<button ref={innerButtonRef}> Inner button </button>
</div>
</Portal>
</div>
</Portal>
// DOM output
<div>
<button>Outer button</button>
</div>
<div>
<button>Inner button</button>
</div>
// Let's add an event listener to 'dismss' the outer portal when clicked outside
// ⚠⚠⚠ This will always be called when clicking on the inner button
document.addEventListener((event) => {
if (outerButtonRef.current.contains(event.target)) {
dismissOuterPortal();
}
})
When the above case is not required, using element.contains
is perfectly fine. But nested cases should still be handled appropriately. We do this using the concept of virtual parents
Portal
will make public 2 utilities that will only be used in cases where the user needs to know if an out of order DOM element will need to be used or not.
setVirtualParent
- sets virtual parent. Portal uses this already internally.elementContains
- similar to element.contains
but uses the virtual hierarchy as referenceBelow shows what a virtual parent is
// Setting a virtual parent
const parent = document.getElementById('parent');
const child = document.getElementById('child');
child._virtual.parent = parent;
Portals
will render a hidden span that will be the virtual parent, by nesting portals virtual parens will also be nested so that elementContains
will work predictably.
<FluentProvider>
<Portal id="portal-1" />
<Portal id="portal-2" />
</FluentProvider>
DOM output:
<body>
<div>
{/* Virtual parent for portal*/}
<span aria-hidden />
{/* Virtual parent for portal*/}
<span aria-hidden />
</div>
<div id="portal-1" class="theme-provider-0">
{children}
</div>
<div id="portal-2" class="theme-provider-0">
{children}
</div>
</body>
<FluentProvider>
<Portal id="portal-1">
<Portal id="portal-2" />
</Portal>
</FluentProvider>
DOM output:
<body>
<div>
{/* Virtual parent for outer portal*/}
<span aria-hidden></span>
</div>
<div id="portal-1" class="theme-provider-0">
{/* Virtual parent for inner portal*/}
<span aria-hidden />
{children}
</div>
<div id="portal-2" class="theme-provider-0">
{children}
</div>
</body>
FAQs
A utility component that creates portals compatible with Fluent UI
We found that @fluentui/react-portal demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 12 open source maintainers collaborating on the project.
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