source: imaps-frontend/node_modules/react-use/lib/useThrottle.js@ d565449

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var react_1 = require("react");
var useUnmount_1 = tslib_1.__importDefault(require("./useUnmount"));
var useThrottle = function (value, ms) {
    if (ms === void 0) { ms = 200; }
    var _a = react_1.useState(value), state = _a[0], setState = _a[1];
    var timeout = react_1.useRef();
    var nextValue = react_1.useRef(null);
    var hasNextValue = react_1.useRef(0);
    react_1.useEffect(function () {
        if (!timeout.current) {
            setState(value);
            var timeoutCallback_1 = function () {
                if (hasNextValue.current) {
                    hasNextValue.current = false;
                    setState(nextValue.current);
                    timeout.current = setTimeout(timeoutCallback_1, ms);
                }
                else {
                    timeout.current = undefined;
                }
            };
            timeout.current = setTimeout(timeoutCallback_1, ms);
        }
        else {
            nextValue.current = value;
            hasNextValue.current = true;
        }
    }, [value]);
    useUnmount_1.default(function () {
        timeout.current && clearTimeout(timeout.current);
    });
    return state;
};
exports.default = useThrottle;