利用a标签，修改url中某些片段和解析url

有时候我们需要修改url中某些数据，比如换掉url的host，用a标签来实现比较简单。

代码如下：

    function hostReplace(src, newHost) {
        let domA = document.createElement('a')
        domA.href = src
        if (newHost) {
            domA.host = newHost
        }
        return domA.href
    }

    console.log(hostReplace('https://search.jd.com/search?keyword=%E8%8B%B9%E6%9E%9C&enc=utf-8&qrst=1&stop=1&vt=2&cid2=12221#J_searchWrap','www.baidu.com'))
    // https://www.baidu.com/search?keyword=%E8%8B%B9%E6%9E%9C&enc=utf-8&qrst=1&stop=1&vt=2&cid2=12221#J_searchWrap

用a标签封装一个解析URL的方法

function parseURL(url) {
    var a =  document.createElement('a');
    a.href = url;
    return {
        source: url,
        protocol: a.protocol.replace(':',''),
        host: a.hostname,
        port: a.port,
        query: a.search,
        params: (function(){
            var ret = {},
                seg = a.search.replace(/^\?/,'').split('&'),
                len = seg.length, i = 0, s;
            for (;i<len;i++) {
                if (!seg[i]) { continue; }
                s = seg[i].split('=');
                ret[s[0]] = s[1];
            }
            return ret;
        })(),
        file: (a.pathname.match(/\/([^\/?#]+)$/i) || [,''])[1],
        hash: a.hash.replace('#',''),
        path: a.pathname.replace(/^([^\/])/,'/$1'),
        relative: (a.href.match(/tps?:\/\/[^\/]+(.+)/) || [,''])[1],
        segments: a.pathname.replace(/^\//,'').split('/')
    };
}

测试代码

 console.log(parseURL("https://search.jd.com/search?keyword=%E6%B0%B4%E6%9E%9C&enc=utf-8&qrst=1&stop=1&vt=2&wq=%E6%B0%B4%E6%9E%9C&stock=1&cid2=12221#J_searchWrap"));

结果如下：

{
    "source": "https://search.jd.com/search?keyword=%E6%B0%B4%E6%9E%9C&enc=utf-8&qrst=1&stop=1&vt=2&wq=%E6%B0%B4%E6%9E%9C&stock=1&cid2=12221#J_searchWrap",
    "protocol": "https",
    "host": "search.jd.com",
    "port": "",
    "query": "?keyword=%E6%B0%B4%E6%9E%9C&enc=utf-8&qrst=1&stop=1&vt=2&wq=%E6%B0%B4%E6%9E%9C&stock=1&cid2=12221",
    "params": {
        "keyword": "%E6%B0%B4%E6%9E%9C",
        "enc": "utf-8",
        "qrst": "1",
        "stop": "1",
        "vt": "2",
        "wq": "%E6%B0%B4%E6%9E%9C",
        "stock": "1",
        "cid2": "12221"
    },
    "file": "search",
    "hash": "J_searchWrap",
    "path": "/search",
    "relative": "/search?keyword=%E6%B0%B4%E6%9E%9C&enc=utf-8&qrst=1&stop=1&vt=2&wq=%E6%B0%B4%E6%9E%9C&stock=1&cid2=12221#J_searchWrap",
    "segments": ["search"]
}