@navikt/ds-react
Version:
React components from the Norwegian Labour and Welfare Administration.
63 lines • 3.24 kB
JavaScript
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
import * as React from "react";
import { forwardRef, useEffect, useState } from "react";
import { Slot } from "../../../slot/Slot.js";
import { useCallbackRef, useMergeRefs } from "../../../util/hooks/index.js";
const AUTOFOCUS_ON_MOUNT = "focusScope.autoFocusOnMount";
const AUTOFOCUS_ON_UNMOUNT = "focusScope.autoFocusOnUnmount";
const EVENT_OPTIONS = { bubbles: false, cancelable: true };
/**
* FocusScope manages focus on mount and unmount of container.
* This is used to better handle autofocus of elements when mounted and unmounted.
* Example usage:
* - Focus first item in a list when mounted
* - Focus a button when unmounted
*/
const FocusScope = forwardRef((_a, ref) => {
var { onMountHandler: onMountHandlerCallback, onUnmountHandler: onUnmountHandlerCallback } = _a, rest = __rest(_a, ["onMountHandler", "onUnmountHandler"]);
const [container, setContainer] = useState(null);
const onMountHandler = useCallbackRef(onMountHandlerCallback);
const onUnmountHandler = useCallbackRef(onUnmountHandlerCallback);
const composedRefs = useMergeRefs(ref, setContainer);
useEffect(() => {
var _a;
if (!container)
return;
const ownerDocument = (_a = container.ownerDocument) !== null && _a !== void 0 ? _a : globalThis === null || globalThis === void 0 ? void 0 : globalThis.document;
const hasFocus = container.contains(ownerDocument.activeElement);
if (!hasFocus) {
const mountEvent = new CustomEvent(AUTOFOCUS_ON_MOUNT, EVENT_OPTIONS);
container.addEventListener(AUTOFOCUS_ON_MOUNT, onMountHandler);
container.dispatchEvent(mountEvent);
}
return () => {
container.removeEventListener(AUTOFOCUS_ON_MOUNT, onMountHandler);
/**
* https://github.com/facebook/react/issues/17894
* As usual when dealing with focus and useEffect,
* we need to defer the focus to the next event-loop
* setTimeout makes sure the code is ran after the next render-cycle
*/
setTimeout(() => {
const unmountEvent = new CustomEvent(AUTOFOCUS_ON_UNMOUNT, EVENT_OPTIONS);
container.addEventListener(AUTOFOCUS_ON_UNMOUNT, onUnmountHandler);
container.dispatchEvent(unmountEvent);
// we need to remove the listener after we `dispatchEvent`
container.removeEventListener(AUTOFOCUS_ON_UNMOUNT, onUnmountHandler);
}, 0);
};
}, [container, onMountHandler, onUnmountHandler]);
return React.createElement(Slot, Object.assign({ tabIndex: -1 }, rest, { ref: composedRefs }));
});
export { FocusScope };
//# sourceMappingURL=FocusScope.js.map