拿到url中的参数对象

getQueryObject = (url) => {
        if (url == null) url = window.location.href;
        var search = url.substring(url.lastIndexOf("?") + 1);
        var obj = {};
        var reg = /([^?&=]+)=([^?&=]*)/g;
        search.replace(reg, function (rs, $1, $2) {
            var name = decodeURIComponent($1);
            var val = decodeURIComponent($2);
            val = String(val);
            obj[name] = val;
            return rs;
        });
        return obj;
    }