菜鸟一枚，自写自用的前端路由器，支持pushstate 和 hashchange ，为写 riot or react 同构程序而写。 请大家多多提点意见，贴上代码库地址 minrouer 代码如下：

;(function() {
    if(!window) return;
    var win = window, evt = 'pushState' in history ? 'popstate' : 'hashchange';

    var regexps = [
        /[\-{}\[\]+?.,\\\^$|#\s]/g,
        /\((.*?)\)/g,
        /(\(\?)?:\w+/g,
        /\*\w+/g,
    ],
    getRegExp = function(route) {
        route = route.replace(regexps[0], '\\$&')
            .replace(regexps[1], '(?:$1)?')
            .replace(regexps[2], function(match, optional) {
                return optional ? match : '([^/?]+)'
            }).replace(regexps[3], '([^?]*?)');
        return new RegExp('^' + route + '(?:\\?([\\s\\S]*))?$');
    },
    extractParams = function(route, fragment) {
        var params = route.exec(fragment).slice(1);
        var results = [], i;
        for(i = 0; i < params.length; i++) {
            results.push(decodeURIComponent(params[i]) || null);
        }
        return results;
    };

    function Router(opts, sep) {
        this.routes = opts.routes;
        this.opts = opts;
        this.sep = sep || '';
        if(this.sep === '/') {
            var self = this;
            win.onload = function() {
                self.exec(location.pathname);
            };
        }
    }
    
    Router.prototype.exec = function(path) {
        for(var r in this.routes) {
            var route = getRegExp(r);
            if (!route.test(path)) {
                continue;
            }
            if (typeof this.routes[r] === 'function') {
                this.routes[r].apply(this, extractParams(route, path));
            } else {
                var fn = this.opts[this.routes[r]];
                fn ? fn.apply(this, extractParams(route, path)) : void 0;
            }
        }
    };
    Router.prototype.start = function() {
        win.addEventListener ? win.addEventListener(evt, this.exec, false) : win.attachEvent('on' + evt, this.exec)
    };
    Router.prototype.stop = function() {
        win.removeEventListener ? win.removeEventListener(evt, this.exec, false) : win.detachEvent('on' + evt, this.exec);
    };
    Router.prototype.go = function(path) {
        if('pushState' in history) {
            history.pushState({state: path}, document.title, path);
            this.exec(path);
        }else {
            if(!this.sep === '/') {
                location.hash =  this.sep + path;
            }
            this.exec(path);
        }
    };
    Router.prototype.hold = function(e) {
        if(!e) return;
        var refresh = false;
        var path = e.srcElement.pathname;
        if(!('pushState' in history)) {
            path = '/' + path;
            if(this.sep === '/') refresh = true;
        }
        this.go(path);
        if(e && e.preventDefault) {
            e.preventDefault();      
        }else {
            if(!refresh) {
                e.returnValue = false;              
                return false; 
            }
        }
    };
    Router.prototype.back = function() {
        history.back();
    };

    if(typeof exports === 'object') {
        module.exports = Router;
    }else if(typeof define === 'function' && define.amd) {
        define(function() { return window.MinRouter = Router; })
    }else {
        window.MinRouter = Router;
    }
})(typeof window != 'undefined' ? window : undefined);