@etsoo/toolpad
Version:
Dashboard framework extention based on Toolpad Core
78 lines (77 loc) • 2.97 kB
JavaScript
;
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.default = useDebouncedHandler;
const React = __importStar(require("react"));
function defer(fn, params, delay) {
const timeout = setTimeout(() => {
fn.current(...params);
}, delay);
return { startTime: Date.now(), timeout, params };
}
/**
* Creates a debounced version of the handler that is passed. The invocation of [fn] is
* delayed for [delay] milliseconds from the last invocation of the debounced function.
*
* This implementation adds on the lodash implementation in that it handles updates to the
* delay value.
*/
function useDebouncedHandler(fn, delay) {
const fnRef = React.useRef(fn);
React.useEffect(() => {
fnRef.current = fn;
}, [fn]);
const delayedInvocation = React.useRef(null);
const clearCurrent = React.useCallback(() => {
if (delayedInvocation.current) {
clearTimeout(delayedInvocation.current.timeout);
delayedInvocation.current = null;
}
}, []);
React.useEffect(() => {
if (!delayedInvocation.current) {
return;
}
const { startTime, params } = delayedInvocation.current;
const elapsed = Date.now() - startTime;
const newDelay = Math.max(delay - elapsed, 0);
clearCurrent();
delayedInvocation.current = defer(fnRef, params, newDelay);
}, [delay, clearCurrent]);
return React.useCallback((...params) => {
clearCurrent();
delayedInvocation.current = defer(fnRef, params, delay);
}, [delay, clearCurrent]);
}