bc518174
 王天杨
提交两个项目文件
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.useCallbackRef = void 0;
var react_1 = require("react");
/**
* creates a MutableRef with ref change callback
* @param initialValue - initial ref value
* @param {Function} callback - a callback to run when value changes
*
* @example
* const ref = useCallbackRef(0, (newValue, oldValue) => console.log(oldValue, '->', newValue);
* ref.current = 1;
* // prints 0 -> 1
*
* @see https://reactjs.org/docs/hooks-reference.html#useref
* @see https://github.com/theKashey/use-callback-ref#usecallbackref---to-replace-reactuseref
* @returns {MutableRefObject}
*/
function useCallbackRef(initialValue, callback) {
var ref = (0, react_1.useState)(function () { return ({
// value
value: initialValue,
// last callback
callback: callback,
// "memoized" public interface
facade: {
get current() {
return ref.value;
},
set current(value) {
var last = ref.value;
if (last !== value) {
ref.value = value;
ref.callback(value, last);
}
},
},
}); })[0];
// update callback
ref.callback = callback;
return ref.facade;
}
exports.useCallbackRef = useCallbackRef;
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