async-reducer-context/libs/sub.js

通过react-context,useReducer替代redux，可扩展支持与redux周边middleware中间件，通过useModel(['key'])可获取state和dispatch，其中useModel已做到获取的属性值变化，组件才会重新渲染，摆脱useContext因context中无关数据导致的重复渲染问题。

var Subs = /** @class */ (function () {
    function Subs() {
        this.observers = [];
    }
    Subs.prototype.add = function (observer) {
        this.observers.push(observer);
    };
    Subs.prototype.notify = function () {
        this.observers.forEach(function (observer) { return observer(); });
    };
    Subs.prototype.delete = function (observer) {
        var index = this.observers.findIndex(function (item) { return item === observer; });
        if (index > -1) {
            this.observers.splice(index, 1);
        }
    };
    return Subs;
}());
export default Subs;