js自定义事件

event.js

    // -------------------- 事件队列 --------------------
    var SLICE = [].slice;
    var events = {};

    function trigger(type /* args... */) {
        var list = events[type];
        if (!list) {
            return;
        }

        var arg = SLICE.call(arguments, 1);
        for(var i = 0, j = list.length; i < j; i++) {
            var cb = list[i];
            if (cb.f.apply(cb.o, arg) === false) {
                break;
            }
        }
    }

    function on(type, listener, context) {
        var queue = events[type] || (events[type] = []);
        queue.push({f: listener, o: context});
    }