party-js/lib/util/lazy.js

A JavaScript library to brighten up your user's site experience with visual effects!

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Lazy = void 0;
/**
 * A wrapper class to lazily initialize a value.
 * Supports custom factory and predicate methods.
 */
var Lazy = /** @class */ (function () {
    function Lazy(factory, exists) {
        if (exists === void 0) { exists = Lazy.defaultExists; }
        this.factory = factory;
        this.exists = exists;
    }
    Object.defineProperty(Lazy.prototype, "current", {
        /**
         * The current value of the lazy object. Will be initialized, if the 'exists'
         * predicate doesn't match.
         */
        get: function () {
            if (!this.exists(this.value)) {
                this.value = this.factory();
            }
            return this.value;
        },
        enumerable: false,
        configurable: true
    });
    Lazy.defaultExists = function (value) {
        return typeof value !== "undefined";
    };
    return Lazy;
}());
exports.Lazy = Lazy;