常用的url转对象的手写方法（未完成，待续）

1. window.location.search 转 query对象

• localhost:3000/article.html?_id=5ce8e25120517f3a68a5b060 中的
• ?_id=5ce8e25120517f3a68a5b060 就是 window.location.search

    function searchToQuery(search) {
        search = search || window.location.search;
        var queryObj = {};
        if (search.indexOf('?') == 0) {
            search = search.substr(1);
        }
        var query = search.split('=')
        for (var i = 0; i < query.length; i += 2) {
            queryObj[query[i]] = query[++i]
        }
        return queryObj;
    }