JavaScript 设计模式: 发布者-订阅者模式

JavaScript 设计模式: 发布者-订阅者模式

发布者-订阅者模式

https://github.com/Kelichao/javascript.basics/issues/22

https://github.com/Kelichao/javascript.basics/issues/67

http://www.alloyteam.com/2012/10/commonly-javascript-design-pattern-observer-mode/

https://github.com/hustcc/onfire.js

shit codes

观察者模式 ??? 又叫发布者-订阅者模式 ???

https://www.cnblogs.com/xgqfrms/p/12904917.html

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 *
 * @description 观察者模式 ??? 又叫发布者-订阅者模式 ???
 * @augments
 * @example
 *
 */

// 观察者模式
const Events = function () {
    let listen,
        log,
        obj = {},
        one,
        remove,
        trigger,
        __this = this;
    listen = function (key, eventfn) {
        let stack,
            _ref; //stack是盒子
        _ref = obj[key];
        stack = (_ref !== null) ? _ref : obj[key] = [];
        return stack.push(eventfn);
    };
    one = function (key, eventfn) {
        remove(key);
        return listen(key, eventfn);
    };
    remove = function (key) {
        let _ref;
        _ref = obj[key]
        return (_ref !== null) ? (_ref.length = 0) : (void 0);
    };
    trigger = function () {
        let fn,
            stack,
            _i,
            _len,
            _ref,
            key;
        key = Array.prototype.shift.call(arguments);
        stack = (_ref = obj[key]) !== null
            ? _ref
            : obj[key] = [];
        for (_i = 0, _len = stack.length; _i < _len; _i++) {
            fn = stack[_i];
            if (fn.apply(__this, arguments) === false) {
                return false;
            }
        }
    };
    return {
        listen: listen, 
        one: one, 
        remove: remove, 
        trigger: trigger
    };
};

const testBook = Event();

// 订阅者
testBook.listen("play", function (data) {
    console.log("今天电影是什么?\n ${data.name}");
});

// 发布者
testBook.trigger("play", {name: "Javascript设计模式 - 观察者模式"});

refs

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