@navikt/ds-react
Version:
React components from the Norwegian Labour and Welfare Administration.
89 lines • 3.71 kB
JavaScript
;
"use client";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.useEventCallback = useEventCallback;
/**
* Stable event callback: returns a function whose identity never changes but always
* invokes the latest `callback`. Avoids stale closures without re‑creating handlers.
*
* Why not `useCallback`? Its identity depends on a deps array:
* - omit deps -> stale; include deps -> new function each render.
* - This hook decouples identity from freshness.
*
* How it works: a single stable "trampoline" function delegates to a mutable ref. The current
* `callback` is promoted from `next` in an insertion/layout phase effect so abandoned concurrent
* renders cannot leak outdated handlers.
*
* Guarantees: stable identity; latest logic executed; no calls from uncommitted renders; dev
* error if invoked during render; safe when `callback` is undefined (no-op).
*/
const react_1 = __importStar(require("react"));
const useRefWithInit_1 = require("./useRefWithInit");
/* https://github.com/mui/material-ui/issues/41190#issuecomment-2040873379 */
const useInsertionEffect = react_1.default[`useInsertionEffect${Math.random().toFixed(1)}`.slice(0, -3)];
const useSafeInsertionEffect =
// React 17 doesn't have useInsertionEffect.
useInsertionEffect &&
// Preact replaces useInsertionEffect with useLayoutEffect and fires too late.
useInsertionEffect !== react_1.useLayoutEffect
? useInsertionEffect
: (fn) => fn();
/**
* TODO: Long term, replace `useCallbackRef` with this hook.
*/
function useEventCallback(callback) {
const stable = (0, useRefWithInit_1.useRefWithInit)(createStableCallback).current;
stable.next = callback;
useSafeInsertionEffect(stable.effect);
return stable.trampoline;
}
function createStableCallback() {
const stable = {
next: undefined,
callback: assertNotCalled,
trampoline: (...args) => { var _a; return (_a = stable.callback) === null || _a === void 0 ? void 0 : _a.call(stable, ...args); },
effect: () => {
stable.callback = stable.next;
},
};
return stable;
}
function assertNotCalled() {
if (process.env.NODE_ENV !== "production") {
throw new Error("Aksel: Cannot call an event handler while rendering.");
}
}
//# sourceMappingURL=useEventCallback.js.map