@ideal-postcodes/jsutil/dist/debounce.js

Browser Address Autocomplete for api.ideal-postcodes.co.uk

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.debounce = exports.isObject = void 0;
const isObject = (value) => {
    var type = typeof value;
    return !!value && (type == "object" || type == "function");
};
exports.isObject = isObject;
const debounce = function (func, wait, options) {
    let lastArgs, lastThis, maxWait, result, timerId, lastCallTime;
    let lastInvokeTime = 0;
    let leading = false;
    let maxing = false;
    let trailing = true;
    if (typeof func !== "function") {
        throw new TypeError("Expected a function");
    }
    wait = +wait || 0;
    if ((0, exports.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) {
        const args = lastArgs;
        const thisArg = lastThis;
        lastArgs = lastThis = undefined;
        lastInvokeTime = time;
        result = func.apply(thisArg, args);
        return result;
    }
    function leadingEdge(time) {
        lastInvokeTime = time;
        timerId = setTimeout(timerExpired, wait);
        return leading ? invokeFunc(time) : result;
    }
    function remainingWait(time) {
        const timeSinceLastCall = time - lastCallTime;
        const timeSinceLastInvoke = time - lastInvokeTime;
        const timeWaiting = wait - timeSinceLastCall;
        return maxing
            ? Math.min(timeWaiting, maxWait - timeSinceLastInvoke)
            : timeWaiting;
    }
    function shouldInvoke(time) {
        const timeSinceLastCall = time - lastCallTime;
        const timeSinceLastInvoke = time - lastInvokeTime;
        return (lastCallTime === undefined ||
            timeSinceLastCall >= wait ||
            timeSinceLastCall < 0 ||
            (maxing && timeSinceLastInvoke >= maxWait));
    }
    function timerExpired() {
        const time = Date.now();
        if (shouldInvoke(time)) {
            return trailingEdge(time);
        }
        timerId = setTimeout(timerExpired, remainingWait(time));
    }
    function trailingEdge(time) {
        timerId = undefined;
        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 pending() {
        return timerId !== undefined;
    }
    function debounced(...args) {
        const time = Date.now();
        const isInvoking = shouldInvoke(time);
        lastArgs = args;
        lastThis = this;
        lastCallTime = time;
        if (isInvoking) {
            if (timerId === undefined) {
                return leadingEdge(lastCallTime);
            }
            if (maxing) {
                timerId = setTimeout(timerExpired, wait);
                return invokeFunc(lastCallTime);
            }
        }
        if (timerId === undefined) {
            timerId = setTimeout(timerExpired, wait);
        }
        return result;
    }
    debounced.cancel = cancel;
    debounced.pending = pending;
    return debounced;
};
exports.debounce = debounce;