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feature/useFocusTrap: Support focusable tab cycles in Modal (Update of PR #3075) (#3133)

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* enhance useFocusTrap: implemented focus trapping, hide non-focusable elements

* add reference link
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Pragadesh-45 2024-09-20 14:19:23 +05:30 committed by GitHub
parent e019a96cd5
commit 563683b5c1
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1 changed files with 21 additions and 11 deletions
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32
packages/bruno-app/src/hooks/useFocusTrap/index.js
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@ -1,24 +1,28 @@
import { useEffect, useRef } from 'react';
const useFocusTrap = (modalRef) => {
const firstFocusableElementRef = useRef(null);
const lastFocusableElementRef = useRef(null);
// refer to this implementation for modal focus: https://stackoverflow.com/a/38865836
const focusableSelector = 'a[href], area[href], input:not([disabled]):not([type="hidden"]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, *[tabindex]:not([tabindex="-1"]), *[contenteditable]';
useEffect(() => {
const modalElement = modalRef.current;
if (!modalElement) return;
const focusableElements = modalElement.querySelectorAll(
'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
);
const focusableElements = Array.from(document.querySelectorAll(focusableSelector));
const modalFocusableElements = Array.from(modalElement.querySelectorAll(focusableSelector));
const elementsToHide = focusableElements.filter(el => !modalFocusableElements.includes(el));
if (focusableElements.length === 0) return;
// Hide elements outside the modal
elementsToHide.forEach(el => {
const originalTabIndex = el.getAttribute('tabindex');
el.setAttribute('data-tabindex', originalTabIndex || 'inline');
el.setAttribute('tabindex', -1);
});
const firstElement = focusableElements[0];
const lastElement = focusableElements[focusableElements.length - 1];
firstFocusableElementRef.current = firstElement;
lastFocusableElementRef.current = lastElement;
// Set focus to the first focusable element in the modal
const firstElement = modalFocusableElements[0];
const lastElement = modalFocusableElements[modalFocusableElements.length - 1];
const handleKeyDown = (event) => {
if (event.key === 'Tab') {
@ -36,6 +40,12 @@ const useFocusTrap = (modalRef) => {
return () => {
modalElement.removeEventListener('keydown', handleKeyDown);
// Restore original tabindex values
elementsToHide.forEach(el => {
const originalTabIndex = el.getAttribute('data-tabindex');
el.setAttribute('tabindex', originalTabIndex === 'inline' ? '' : originalTabIndex);
});
};
}, [modalRef]);
};