info-bus/info-bus.js

It can be used to communicate in any project.

'use strict';
var infoBus = {
    events: {},
    $emit: function $emit(name) {
        // 触发事件
        var taskArray = this.events[name];
        if (taskArray instanceof Array) {
            for (var _len = arguments.length, rest = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
                rest[_key - 1] = arguments[_key];
            }

            var _iteratorNormalCompletion = true;
            var _didIteratorError = false;
            var _iteratorError = undefined;

            try {
                for (var _iterator = taskArray[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
                    var task = _step.value;

                    task.callback.apply(this, rest);
                    if (task.type === 'once') {
                        var index = taskArray.indexOf(task);
                        taskArray.splice(index, 1);
                    }
                }
            } catch (err) {
                _didIteratorError = true;
                _iteratorError = err;
            } finally {
                try {
                    if (!_iteratorNormalCompletion && _iterator.return) {
                        _iterator.return();
                    }
                } finally {
                    if (_didIteratorError) {
                        throw _iteratorError;
                    }
                }
            }
        }
    },
    $on: function $on(name, callback) {
        // 注册事件
        var taskArray = this.events[name];
        if (taskArray === undefined) {
            this.events[name] = [];
            this.events[name].push({ type: 'on', callback: callback });
        } else {
            taskArray.push({ type: 'on', callback: callback });
        }
    },
    $off: function $off(name, callback) {
        // 注销事件
        if (callback === undefined) {
            this.events[name] = [];
            return;
        }
        var taskArray = this.events[name];
        if (taskArray instanceof Array) {
            taskArray.map(function (task, index, array) {
                if (task.callback === callback) {
                    array.splice(index, 1);
                }
            });
        }
    },
    $once: function $once(name, callback) {
        // 监听一次
        var taskArray = this.events[name];
        if (taskArray === undefined) {
            this.events[name] = [];
            this.events[name].push({ type: 'once', callback: callback });
        } else {
            taskArray.push({ type: 'once', callback: callback });
        }
    }
};
module.exports = infoBus;