按名稱查找cookie，然後返回包含使用javascript的值的cookie（不是jquery）

有沒有從document.cookie獲取cookie的懶惰方法？按名稱查找cookie，然後返回包含使用javascript的值的cookie（不是jquery）

如果document.cookie是例如

abc_tracker = abc_visit_time％3D1435256807463％7Cabc_campaign_id％3D0％7Cabc_adgroup_id％3D0％7Cabc_content_id％3D0％7Cabc_medium％3Dreferral％7Cabc_source％3Dblog.example.com％7Cabc_campaign％3Dnone％7Cabc_adgroup％3Dnone％7Cabc_content％3Dnone％7Cabc_term％ 3Dnone％7Cabc_match％3Dnone％7Cabc_keyword％3Dnone％7Cabc_ref_keyword％3Dbm9uZQ％3D％3D％7Cabc_url％3DaHR0cDovL3d3dy5nb3dheS5jb20vP19nYT0xLjM4NTgyNjkxLjEyMTg5NTk2Mi4xNDM1MjQ5OTU2％7Cabc_ref_url％3DaHR0cDovL2Jsb2cuZ293YXkuY29tL2dsb2JldHJvdHRpbmcvP19nYT0xLjM4NTgyNjkxLjEyMTg5NTk2Mi4xNDM1MjQ5OTU2; viewedOuibounceModal = true; LAST_SLIDEIN_VIEW = 1435262685800; LAST_SLIDEIN_TYPE = CHAT; c_m = vst_channel％3Dundefined％7Cvst_keyword％3Dundefined％7Cvst_referringDomain％3Dundefined％7Cvst_campaign％3Dundefined; __atuvc = 11％7C25; __atuvs = 558d4a4029c67edc001; bloglanding = FALSE; vst_tracker = ID％3D1435322882823％7Cvid％3D1435256807463％7Cmedium％3Ddirect％7Centry_page_url％3Dhttp％253A％252F％252Fwww.example.com％252F; __utma = 148710120.217599539.1435256807.1435262252.1435322883.3; __utmb = 148710120.18.10.1435322883; __utmc = 148710120; __utmz = 148710120.1435256807.1.1.utmcsr = blog.example.com | utmccn =（引薦）| utmcmd =轉診| utmcct = /壯士/; __utmv = 148710120。| 1 = vtime = 1435256807463 = 1; abc_page_count = 7; s_cc = TRUE; s_fid = 0B06C0537063F838-34C8F3D8F41ABCC8; s_sq =％5B％5BB％5D％5D; _ga = GA1.2.121895962.1435249956; __ar_v4 = 6UZ4UQZOCVE2RJGEKNO2AE％3A20150625％3A2％7CLDQ27DO6EFHARNHUHZLKF3％3A20150625％3A41％7CRYLYAX2L7NBGHDJQDTJYYL％3A20150625％3A41％7CDYK2HT5L5FGJNJFVXXPM4K％3A20150625％3A38％7CVIWWR64QNBEITBPWIV5TWP％3A20150625％3A1

比方說，我想找到_ga餅乾。讀取上面的餅乾（接近底部）它是整個事情是_ga=GA1.2.121895962.1435249956

只使用香草JavaScript，檢索這個最簡單的方法是什麼？

我去了一個兔子洞，試圖使用匹配：

var bla = document.cookie.match(/_ga/) // returns the matched string. 
bla.input // returns the whole thing.

基於輸入「_ga」，什麼是短暫簡單的方法來獲取返回以下值：_ga=GA1.2.121895962.1435249956

來源

2015-06-26 Doug Fir

首先，設置功能

function createCookie(name,value,days) { 
    if (days) { 
     var date = new Date(); 
     date.setTime(date.getTime()+(days*24*60*60*1000)); 
     var expires = "; expires="+date.toGMTString(); 
    } 
    else var expires = ""; 
    document.cookie = name+"="+value+expires+"; path=/"; 
} 

function readCookie(name) { 
    var nameEQ = name + "="; 
    var ca = document.cookie.split(';'); 
    for(var i=0;i < ca.length;i++) { 
     var c = ca[i]; 
     while (c.charAt(0)==' ') c = c.substring(1,c.length); 
     if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length); 
    } 
    return null; 
} 

function eraseCookie(name) { 
    createCookie(name,"",-1); 
}

然後您只需要閱讀並設置它。

//Setting 
createCookie('_ga','9saua9s8d89w',7); 
//Reading 
var x = readCookie('_ga') 
if (x) { 
    //[do something with x] 
}

編輯通過REGEXP

function readCookie(cookieName) { 
var re = new RegExp('[; ]'+cookieName+'=([^\\s;]*)'); 
var sMatch = (' '+document.cookie).match(re); 
if (cookieName && sMatch) return unescape(sMatch[1]); 
return ''; 
}

然後

var x = readCookie('_ga'); 
if (x) { 
    //[do something with x] 
}

OR，只是REGEXP代碼

var cookie = "_ga" 
var re = new RegExp('[; ]'+cookie+'=([^\\s;]*)'); 
var cookieVal = unescape((' '+document.cookie).match(re)[1]); 

console.log(cookieVal); //GA1.2.116321536.1432242890

來源

2015-06-26 13:25:24

感謝您的回答。我知道這會起作用。我應該更加明確：我希望在match（）中使用正則表達式（更少線條）解決方案 –

看看我的回答編輯（：現在你得到你想要的東西 –

這真是太棒了，謝謝！ –

嘗試以下操作：

var _ga = document.cookie.split(';').map(function(x) { 
    return x.trim().split(/(=)/); 
}).reduce(function(a, b) { 
    a[b[0]] = a[b[0]] ? a[b[0]] + ', ' + b.slice(2).join('') : 
    b.slice(2).join(''); 
    return a; 
}, {})["_ga"]; // <--- cookie you are looking for. 

console.log(_ga);

Here你可以找到更多信息。

來源

2015-06-26 13:29:34 DavidDomain

按名稱查找cookie，然後返回包含使用javascript的值的cookie（不是jquery）

回答

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