use-focus-trap

Trap focus inside given node
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Package
@mantine/hooks

Usage

use-focus-trap traps focus at given node, for example in modal, drawer or menu. Node must include at least one focusable element. When node unmounts, focus trap is automatically disabled.

import { useFocusTrap } from '@mantine/hooks';


function Demo() {
  const focusTrapRef = useFocusTrap();


  return (
    <div ref={focusTrapRef}>
      <input />
    </div>
  );
}

API

Hook accepts focus trap active state as single argument:

useFocusTrap(); // -> focus trap inactive
useFocusTrap(true); // -> focus trap active


useFocusTrap(false); // -> focus trap disabled

Hook returns ref that should be passed to dom node:

const focusTrapRef = useFocusTrap();


// With regular element:
<div ref={focusTrapRef} />


// With Mantine component:
<Paper ref={focusTrapRef} />

Combine with other ref based hooks

Usually focus trap is not used alone. To combine use-focus-trap hook with other ref based hooks use use-merged-ref hook:

import { useRef } from 'react';
import { useClickOutside, useFocusTrap, useMergedRef } from '@mantine/hooks';


function Demo() {
  const myRef = useRef();
  const useClickOutsideRef = useClickOutside(() => {});
  const focusTrapRef = useFocusTrap();
  const mergedRef = useMergedRef(myRef, useClickOutsideRef, focusTrapRef);


  return <div ref={mergedRef} />;
}

Initial focus

By default, focus trap will move focus to first interactive element. To specify element that should receive initial focus add data-autofocus attribute, note that focus trap works with dom and this attribute should be added to element:

import { useFocusTrap } from '@mantine/hooks';


function Demo() {
  const focusTrapRef = useFocusTrap();


  return (
    <div ref={focusTrapRef}>
      <input />
      {/* Second input in modal will have initial focus */}
      <input data-autofocus />
      <input />
    </div>
  );
}

Examples

use-focus-trap is used in some Mantine components: Modal, Drawer, Menu and others.

Modal example – when modal is opened focus is trapped inside:

Menu example – when menu is opened focus is trapped inside and Tab key is disabled:

Definition

function useFocusTrap(active?: boolean): (instance: HTMLElement) => void;
Go back
use-focus-return – @mantine/hooks
Up next
use-focus-within – @mantine/hooks
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