@foolishchow/vue-cli-plugin-ts-router-gen/lib/watcher/debounce.js

vue-router typescript generator for vue-class-component

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var isObject = function (value) {
    var type = typeof value;
    return value != null && (type == 'object' || type == 'function');
};
exports.debounce = function (func, wait, options) {
    if (options === void 0) { options = {}; }
    var lastArgs, lastThis, maxWait, result, timerId, lastCallTime;
    var lastInvokeTime = 0;
    var leading = false;
    var maxing = false;
    var trailing = true;
    if (typeof func != 'function') {
        throw new TypeError('Expected a function');
    }
    wait = +wait || 0;
    if (isObject(options)) {
        leading = !!options.leading;
        maxing = 'maxWait' in options;
        maxWait = maxing ? Math.max(+options.maxWait || 0, wait) : maxWait;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
    }
    function invokeFunc(time) {
        var args = lastArgs;
        var thisArg = lastThis;
        lastArgs = lastThis = undefined;
        lastInvokeTime = time;
        result = func.apply(thisArg, args);
        return result;
    }
    function leadingEdge(time) {
        // Reset any `maxWait` timer.
        lastInvokeTime = time;
        // Start the timer for the trailing edge.
        timerId = setTimeout(timerExpired, wait);
        // Invoke the leading edge.
        return leading ? invokeFunc(time) : result;
    }
    function remainingWait(time) {
        var timeSinceLastCall = time - lastCallTime;
        var timeSinceLastInvoke = time - lastInvokeTime;
        var timeWaiting = wait - timeSinceLastCall;
        return maxing
            ? Math.min(timeWaiting, maxWait - timeSinceLastInvoke)
            : timeWaiting;
    }
    function shouldInvoke(time) {
        var timeSinceLastCall = time - lastCallTime;
        var timeSinceLastInvoke = time - lastInvokeTime;
        // Either this is the first call, activity has stopped and we're at the
        // trailing edge, the system time has gone backwards and we're treating
        // it as the trailing edge, or we've hit the `maxWait` limit.
        return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
            (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
    }
    function timerExpired() {
        var time = Date.now();
        if (shouldInvoke(time)) {
            return trailingEdge(time);
        }
        // Restart the timer.
        timerId = setTimeout(timerExpired, remainingWait(time));
    }
    function trailingEdge(time) {
        timerId = undefined;
        // Only invoke if we have `lastArgs` which means `func` has been
        // debounced at least once.
        if (trailing && lastArgs) {
            return invokeFunc(time);
        }
        lastArgs = lastThis = undefined;
        return result;
    }
    function cancel() {
        if (timerId !== undefined) {
            clearTimeout(timerId);
        }
        lastInvokeTime = 0;
        lastArgs = lastCallTime = lastThis = timerId = undefined;
    }
    function flush() {
        return timerId === undefined ? result : trailingEdge(Date.now());
    }
    var debounced = function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var time = Date.now();
        var isInvoking = shouldInvoke(time);
        lastArgs = args;
        lastThis = this;
        lastCallTime = time;
        if (isInvoking) {
            if (timerId === undefined) {
                return leadingEdge(lastCallTime);
            }
            if (maxing) {
                // Handle invocations in a tight loop.
                timerId = setTimeout(timerExpired, wait);
                return invokeFunc(lastCallTime);
            }
        }
        if (timerId === undefined) {
            timerId = setTimeout(timerExpired, wait);
        }
        return result;
    };
    debounced.cancel = cancel;
    debounced.flush = flush;
    return debounced;
};