@web-atoms/core-docs/dist/view-model/Once.js

Web Atoms Core

(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "./baseTypes"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    const baseTypes_1 = require("./baseTypes");
    const timerSymbol = Symbol();
    const Once = (timeInMS = 100) => (target, key) => {
        baseTypes_1.registerInit(target, (vm) => {
            // tslint:disable-next-line: ban-types
            const oldMethod = vm[key];
            let keyTimer = vm[timerSymbol];
            if (typeof keyTimer === "undefined") {
                keyTimer = {};
                vm[timerSymbol] = keyTimer;
            }
            let running = false;
            // tslint:disable-next-line:only-arrow-functions
            vm[key] = (...a) => {
                if (running) {
                    return;
                }
                const pending = keyTimer[key];
                if (pending) {
                    clearTimeout(pending);
                }
                keyTimer[key] = setTimeout((...b) => {
                    running = true;
                    delete keyTimer[key];
                    const r = oldMethod.apply(vm, b);
                    if (r && r.then) {
                        r.then(() => {
                            running = false;
                        }, (e) => {
                            running = false;
                            // tslint:disable-next-line: no-console
                            console.warn(e);
                        });
                    }
                    else {
                        running = false;
                    }
                }, timeInMS, ...a);
            };
        });
    };
    exports.default = Once;
});
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