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

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

其他回答

Kirlich给出了一个很好的解决方案。然而，当有两个cookie值具有相似的名称时，它会失败，这里有一个简单的修复这种情况:

function getCookie(name) {
  var value = "; " + document.cookie;
  var parts = value.split("; " + name + "=");
  if (parts.length >= 2) return parts.pop().split(";").shift();
}

2016-11-08 01:12:18

只需使用以下函数(纯javascript代码)

const getCookie = (name) => {
 const cookies = Object.assign({}, ...document.cookie.split('; ').map(cookie => {
    const name = cookie.split('=')[0];
    const value = cookie.split('=')[1];

    return {[name]: value};
  }));

  return cookies[name];
};

2020-02-09 11:07:51

显然，MDN从未听说过单词边界正则表达式字符类\b，它与相邻的\w+相匹配，而\w+在两侧有界:

getCookie = function(name) {
    var r = document.cookie.match("\\b" + name + "=([^;]*)\\b");
    return r ? r[1] : null;
};

var obligations = getCookie('obligations');

2018-05-11 02:33:08

我的一个线性函数通过键来获取cookie值。

cookie = key=>((new RegExp((key || '=')+'=(.*?); ','gm')).exec(document.cookie+'; ') ||['',null])[1]

调用cookie函数

cookie('some-key')

2020-06-11 05:27:10

在我看来，你可以把cookie键值对分成一个数组，并基于你的搜索:

var obligations = getCookieData("obligations");

运行如下:

function getCookieData( name ) {
    var pairs = document.cookie.split("; "),
        count = pairs.length, parts; 
    while ( count-- ) {
        parts = pairs[count].split("=");
        if ( parts[0] === name )
            return parts[1];
    }
    return false;
}

小提琴:http://jsfiddle.net/qFmPc/

或者甚至可能是以下内容:

function getCookieData( name ) {
    var patrn = new RegExp( "^" + name + "=(.*?);" ),
        patr2 = new RegExp( " " + name + "=(.*?);" );
    if ( match = (document.cookie.match(patrn) || document.cookie.match(patr2)) )
        return match[1];
    return false;
}

2012-05-24 02:47:39

通过名称获取cookie

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