解析url参数和往url拼接参数

const urlUtil = {
    // 获取url的参数
    getQuery(url) {
        url = url || window.location.href;
        const [path0, hash] = url.split('#');
        const [_0, search] = path0.split('?');
        const [_1, hashSearch] = (hash || '').split('?');
        console.log(_0, _1);
        const query0 = this._parseSearch('?' + (search || ''));
        const query1 = this._parseSearch('?' + (hashSearch || ''));
        return { ...query0, ...query1 };
    },
    // 添加参数
    addQuery(params, url) {
        params = params || {};
        url = url || window.location.href;
        let [path0, hash] = url.split('#');
        // 如果有hash，则参数加在hash后面，否则加在search上
        if (hash) {
            const [newHash, hashSearch] = hash.split('?');
            const query = this._parseSearch('?' + (hashSearch || ''));
            const newQueryStr = this._queryString({
                ...query,
                ...params,
            });
            hash = newHash + (newQueryStr ? '?' + newQueryStr : '');
        } else {
            const [newPath0, search] = path0.split('?');
            const query = this._parseSearch('?' + (search || ''));
            const newQueryStr = this._queryString({
                ...query,
                ...params,
            });
            path0 = newPath0 + (newQueryStr ? '?' + newQueryStr : '');
        }
        return path0 + (hash ? '#' + hash : '');
    },
    // 移除参数
    removeQuery(keys, url) {
        keys = keys || [];
        url = url || window.location.href;
        let [path0, hash] = url.split('#');
        if (hash) {
            const [newHash, hashSearch] = hash.split('?');
            const query = this._parseSearch('?' + (hashSearch || ''));
            keys.forEach(key => {
                delete query[key];
            });
            const newQueryStr = this._queryString(query);
            hash = newHash + (newQueryStr ? '?' + newQueryStr : '');
        }
        const [newPath0, search] = path0.split('?');
        const query = this._parseSearch('?' + (search || ''));
        keys.forEach(key => {
            delete query[key];
        });
        const newQueryStr = this._queryString(query);
        path0 = newPath0 + (newQueryStr ? '?' + newQueryStr : '');
        return path0 + (hash ? '#' + hash : '');
    },
    _parseSearch(search = '') {
        // search里面一定要有问号
        search = search || '';
        const queryObj = {};
        const reg = /[?&]([^=&#]+)=([^&#]*)/g;
        const queryArr = search.match(reg) || [];
        for (const i in queryArr) {
            if (Object.hasOwnProperty.call(queryArr, i)) {
                const query = queryArr[i].split('=');
                const key = query[0].substr(1);
                const value = decodeURIComponent(query[1]);
                queryObj[key] = value;
            }
        }
        return queryObj;
    },
    _queryString(query = {}) {
        return Object.keys(query).map(key => `${key}=${(query[key] == null ? '' : query[key])}`).join('&');
    }
}
export default urlUtil;