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

这是一个很简短的版本

 function getCookie(n) {
    let a = `; ${document.cookie}`.match(`;\\s*${n}=([^;]+)`);
    return a ? a[1] : '';
}

注意，我使用了ES6的模板字符串来组成正则表达式。

2016-11-24 12:24:20

其他回答

const cookies = 'key1=chocolate; key2=iceCream; key3=cookies;';

// convert string into array with split
const arrCookies = cookies.split('; '); // [ 'key1=chocolate', 'key2=iceCream', 'key3=cookies' ]

// split key value by equal sign
const arrArrCookiesKeyValue = arrCookies.map(cookie => [cookie.split('=')]);  // [[['key1', 'chocolate']], ...']

// make an object with key value
const objectKeyValueCookies = {}; // { key1: 'chocolate', key2: 'iceCream', key3: 'cookies;' }
for (let arr of arrArrCookiesKeyValue) {
    objectKeyValueCookies[arr[0][0]] = arr[0][1];
}

// find the key in object
const findValueByKey = (key = null, objectCookies) => objectCookies[key];
console.log(findValueByKey('key2', objectKeyValueCookies)); // chocolate

2021-03-23 02:16:39

cookie示例: JS:

document.cookies = {
   create : function(key, value, time){
     if (time) {
         var date = new Date();
         date.setTime(date.getTime()+(time*24*60*60*1000));
         var expires = "; expires="+date.toGMTString();
     }
     else var expires = "";
     document.cookie = key+"="+value+expires+"; path=/";
   },
   erase : function(key){
     this.create(key,"",-1);
   },
   read : function(key){
     var keyX = key + "=";
     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(keyX) == 0) return   c.substring(keyX.length,c.length);
     }
     return null;
   }
}

使用json或xml存储数组和对象

2016-01-12 15:54:11

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

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

我会这样做:

function getCookie(cookie){
  return cookie
    .trim()
    .split(';')
    .map(function(line){return line.split(',');})
    .reduce(function(props,line) {
      var name = line[0].slice(0,line[0].search('='));
      var value = line[0].slice(line[0].search('='));
      props[name] = value;
      return props;
    },{})
}

这将以对象的形式返回cookie。

然后你可以这样调用它:

getCookie(document.cookie)['shares']

2016-01-15 15:39:40

通过名称获取cookie

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