通过名称获取cookie

我有一个getter从cookie中获取值。

现在我有了两个cookie，名字分别是shares=和obligation =。

我想让这个getter只从义务cookie中获取值。

我怎么做呢?因此for语句将数据拆分为单独的值，并将其放入数组中。

 function getCookie1() {
    // What do I have to add here to look only in the "obligations=" cookie? 
    // Because now it searches all the cookies.

    var elements = document.cookie.split('=');
    var obligations= elements[1].split('%');
    for (var i = 0; i < obligations.length - 1; i++) {
        var tmp = obligations[i].split('$');
        addProduct1(tmp[0], tmp[1], tmp[2], tmp[3]);
    }
 }

当前回答

我更喜欢在cookie上使用一个正则表达式匹配:

window.getCookie = function(name) {
  var match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
  if (match) return match[2];
}

也可以作为函数使用，检查下面的代码。

function check_cookie_name(name) 
    {
      var match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
      if (match) {
        console.log(match[2]);
      }
      else{
           console.log('--something went wrong---');
      }
   }

感谢Scott Jungwirth的评论。

2014-01-14 22:13:12

其他回答

总是很有效:

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

function setCookie(variable, value, expires_seconds) {
    var d = new Date();
    d = new Date(d.getTime() + 1000 * expires_seconds);
    document.cookie = variable + '=' + value + '; expires=' + d.toGMTString() + ';';
}

对jQuery或任何东西都没有要求。纯粹的老JavaScript。

2015-03-13 16:52:59

下面的函数将返回所需cookie的一个键-值对，其中key是cookie名称，value是cookie的值。

/**
 * Returns cookie key-value pair
 */
var getCookieByName = function(name) {
    var result = ['-1','-1'];
    if(name) {
        var cookieList = document.cookie.split(';');
        result = $.grep(cookieList,function(cookie) { 
            cookie = cookie.split('=')[0];
            return cookie == name;
        });
    }
    return result;
};

2016-01-11 07:29:48

现在，当以数组格式存储cookie时，可以让cookie以数组形式返回。例如，你的cookie数组[35]=Khóa;数组[36]= Tử;数组[37]= Cử; 这段代码也包含utf8。当你的cookie名称内容[]在其中，而你存储的cookie不在数组中时，一件事不会很好地工作。

function getCookie(cname) {

            var ca = decodeURIComponent(document.cookie).split(';');


            if (cname.indexOf('[]') > 0) {
                var returnVAlue = [];
                var nameArray = cname.replace("[]", "");

                for(var i = 0; i < ca.length; i++) {
                    var c = ca[i];
                   // console.log(c);
                    while (c.charAt(0) == ' ') {
                        c = c.substring(1);
                    }

                    if (c.indexOf(nameArray) >= 0) {
                        var valueString = c.substr(nameArray.length, c.length);

                        var valueStringSlit = valueString.split('=');
                        valueStringSlit[0] = valueStringSlit[0].substr(1,(valueStringSlit[0].length - 2));
                    //    console.log(valueStringSlit);

                        returnVAlue.push(valueStringSlit);
                    }
                }
            } else {
                var returnVAlue = '';
                var name = cname + "=";

                for(var i = 0; i < ca.length; i++) {
                    var c = ca[i];
                   // console.log(c);
                    while (c.charAt(0) == ' ') {
                        c = c.substring(1);
                    }
                    if (c.indexOf(name) == 0) {
                        returnVAlue = c.substr(name.length, c.length);
                    } 
                }
            }


            if (returnVAlue != ''){
                return returnVAlue;
            } 
            return "";
        }

       // console.log(decodeURIComponent(document.cookie));


        console.log(getCookie('array[]'));

2018-09-26 06:57:56

我写了一些可能很容易使用的东西，如果有人有什么要补充的，请随时这样做。

function getcookie(name = '') {
    let cookies = document.cookie;
    let cookiestore = {};
    
    cookies = cookies.split(";");
    
    if (cookies[0] == "" && cookies[0][0] == undefined) {
        return undefined;
    }
    
    cookies.forEach(function(cookie) {
        cookie = cookie.split(/=(.+)/);
        if (cookie[0].substr(0, 1) == ' ') {
            cookie[0] = cookie[0].substr(1);
        }
        cookiestore[cookie[0]] = cookie[1];
    });
    
    return (name !== '' ? cookiestore[name] : cookiestore);
}

使用

Getcookie() -返回一个包含网页上所有cookie的对象。

getcookie('myCookie') -从cookie对象返回cookie myCookie的值，否则如果cookie为空或未设置则返回undefined。

例子

// Have some cookies :-)
document.cookie = "myCookies=delicious";
document.cookie = "myComputer=good";
document.cookie = "myBrowser=RAM hungry";

// Read them
console.log( "My cookies are " + getcookie('myCookie') );
// Outputs: My cookies are delicious

console.log( "My computer is " + getcookie('myComputer') );
// Outputs: My computer is good

console.log( "My browser is " + getcookie('myBrowser') );
// Outputs: My browser is RAM hungry

console.log( getcookie() );
// Outputs: {myCookie: "delicious", myComputer: "good", myBrowser: "RAM hungry"}

// (does cookie exist?)
if (getcookie('hidden_cookie')) {
    console.log('Hidden cookie was found!');
} else {
    console.log('Still no cookie :-(');
}

// (do any cookies exist?)
if (getcookie()) {
    console.log("You've got cookies to eat!");
} else {
    console.log('No cookies for today :-(');
}

2020-07-16 19:19:52

function getCookie(cname) {
  var name = cname + "=";
  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);
    }
    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }
  return "";
}

将cookie名称传递给getCookie()函数以获取它的值

2021-02-04 09:57:55

通过名称获取cookie

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