👁 React-Focus-On

lock and loaded!

The final solution for WAI ARIA compatible Modal Dialogs or any full-screen tasks:

• locks focus inside using react-focus-lock
• disables page scroll and user interactions using react-remove-scroll
• hides rest of a page from screen-readers using aria-hidden

Now you could focus on a single task.

This is basically the inert

Minimal size - no more than 2kb, maximal - no more that 6kb. See sidecar example for details.

Example

Code sandbox example - https://codesandbox.io/s/p3vjp8mzw7

import {FocusOn} from 'react-focus-on';

<FocusOn
 onClickOutside={callback}
 onEscapeKey={callback}
 shards={[externalRef]}
>
 content you should be "focused" on
</FocusOn>

API

FocusOn

FocusOn - the focus on component

• enabled - controls behaviour
• [shards] - a list of Refs to be considered as a part of the Lock. A way to properly handle portals or scattered lock.

---

• [autoFocus=true] - enables or disables auto focus management (see react-focus-lock documentation)
• [returnFocus=true] - enables or disables return focus on lock deactivation (see react-focus-lock documentation)
• [whiteList=fn] - you could whitelist locations FocusLock should carry about. Everything outside it will ignore. For example - any modals (see react-focus-lock documentation)
• [crossFrame=true] - enables or disables cross frame focus trapping. Setting this to false allows focus to move outside iframes (see react-focus-lock issue)

---

• [gapMode] - the way removed ScrollBar would be compensated - margin(default), or padding. See scroll-locky documentation to find the one you need.
• [noIsolation] - disables aria-hidden isolation
• [inert] - enables pointer-events isolation (☠️ dangerous, use to disable "parent scrollbars", refer to react-remove-scroll documentation)
• [allowPinchZoom] - enables "pinch-n-zoom" behavior. By default it might be prevented, refer to react-remove-scroll documentation
• [preventScrollOnFocus] - prevents a side effect of a programatic page scroll caused by focusing elements. Especially useful to address modal animations.

---

• [onActivation] - on activation callback
• [onDeactivation] - on deactivation callback

---

• [onClickOutside] - on click outside of "focus" area. (actually on any event "outside")
• [onEscapeKey] - on Esc key down (and not defaultPrevented)

Additional API

Exposed from React-Focus-Lock

• AutoFocusInside - to mark autofocusable element
• MoveFocusInside - to move focus inside a component on mount
• InFocusGuard - to "guard" a shard node (place an invisible node before and after)

See react-focus-lock documentation for details.

Exposed from React-Remove-Scroll

• classNames.fullWidth - "100%" width (will not change on scrollbar removal)
• classNames.zeroRight - "0" right (will not change on scrollbar removal)

See react-remove-scroll for details.

PS: Version 1 used React-scroll-locky which was replaced by remove-scroll.

Size

• (🧩 full) 5.7kb after compression (excluding tslib).

---

• (👁 UI) 2kb, visual elements only
• (🚗 sidecar) 4kb, side effects

Import full

import {FocusOn} from 'react-focus-on';

<FocusOn>
 {content}
</FocusOn> 

Import UI only

import {FocusOn} from 'react-focus-on/UI';
import {sidecar} from "use-sidecar";

const FocusOnSidecar = sidecar(  
  () => import(/* webpackPrefetch: true */ "react-focus-on/sidecar")
);

<FocusOn
    sideCar={FocusOnSidecar}
>
 {content}
</FocusOn> 

React versions

• v1 and v2 might work with React 15/16
• v3 require React 16.8+ (hooks)

Licence

MIT