利用a標簽自動解析URL

對於window.location，我們比較熟悉，它有protocol，hostname，host，port，search，hash，href，pathname等屬性，a標簽也和window.location一樣，也有這樣屬性，這樣可以方便我們分析網址，閑話少說，上代碼。

function parseURL(url) {
    var a =  document.createElement('a');
    a.href = url;
    return {
        source: url,
        protocol: a.protocol.replace(':',''),
        host: a.hostname,
        port: a.port||'80',
        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('/')
    };
}

測試地址

console.log(parseURL("http://www.w3school.com.cn/jsref/dom_obj_anchor.asp?type=2#id2"));

結果如下

{
    file: "dom_obj_anchor.asp",
    hash: "id2",
    host: "www.w3school.com.cn",
    params: {type: "2"},
    path: "/jsref/dom_obj_anchor.asp",
    port: "80",
    protocol: "http",
    query: "?type=2",
    relative: "/jsref/dom_obj_anchor.asp?type=2#id2",
    segments: [0: "jsref",1: "dom_obj_anchor.asp"],
    source: "http://www.w3school.com.cn/jsref/dom_obj_anchor.asp?type=2#id2"
}