bc518174
 王天杨
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.useRefToCallback = exports.refToCallback = void 0;
/**
* Unmemoized version of {@link useRefToCallback}
* @see {@link useRefToCallback}
* @param ref
*/
function refToCallback(ref) {
return function (newValue) {
if (typeof ref === 'function') {
ref(newValue);
}
else if (ref) {
ref.current = newValue;
}
};
}
exports.refToCallback = refToCallback;
var nullCallback = function () { return null; };
// lets maintain a weak ref to, well, ref :)
// not using `kashe` to keep this package small
var weakMem = new WeakMap();
var weakMemoize = function (ref) {
var usedRef = ref || nullCallback;
var storedRef = weakMem.get(usedRef);
if (storedRef) {
return storedRef;
}
var cb = refToCallback(usedRef);
weakMem.set(usedRef, cb);
return cb;
};
/**
* Transforms a given `ref` into `callback`.
*
* To transform `callback` into ref use {@link useCallbackRef|useCallbackRef(undefined, callback)}
*
* @param {ReactRef} ref
* @returns {Function}
*
* @see https://github.com/theKashey/use-callback-ref#reftocallback
*
* @example
* const ref = useRef(0);
* const setRef = useRefToCallback(ref);
* 👉 setRef(10);
* ✅ ref.current === 10
*/
function useRefToCallback(ref) {
return weakMemoize(ref);
}
exports.useRefToCallback = useRefToCallback;
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