beautiful-react-hooks/useTimeout.js

A collection of beautiful (and hopefully useful) React hooks to speed-up your components and hooks development

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var react_1 = require("react");
var isFunction_1 = __importDefault(require("./shared/isFunction"));
var defaultOptions = {
    cancelOnUnmount: true
};
/**
 * An async-utility hook that accepts a callback function and a delay time (in milliseconds), then delays the
 * execution of the given function by the defined time.
 */
var useTimeout = function (fn, milliseconds, options) {
    if (options === void 0) { options = defaultOptions; }
    var opts = __assign(__assign({}, defaultOptions), (options || {}));
    var timeout = (0, react_1.useRef)();
    var callback = (0, react_1.useRef)(fn);
    var _a = (0, react_1.useState)(false), isCleared = _a[0], setIsCleared = _a[1];
    // the clear method
    var clear = (0, react_1.useCallback)(function () {
        if (timeout.current) {
            clearTimeout(timeout.current);
            setIsCleared(true);
        }
    }, []);
    // if the provided function changes, change its reference
    (0, react_1.useEffect)(function () {
        if ((0, isFunction_1.default)(fn)) {
            callback.current = fn;
        }
    }, [fn]);
    // when the milliseconds change, reset the timeout
    (0, react_1.useEffect)(function () {
        if (typeof milliseconds === 'number') {
            timeout.current = setTimeout(function () {
                callback.current();
            }, milliseconds);
        }
        return clear;
    }, [milliseconds]);
    // when component unmount clear the timeout
    (0, react_1.useEffect)(function () { return function () {
        if (opts.cancelOnUnmount) {
            clear();
        }
    }; }, []);
    return [isCleared, clear];
};
exports.default = useTimeout;