如何在javascript中将值附加到cookie

Question

自从我用javascript设置cookie值以来已经15年了...

document.cookie = 'key=value';  //got that ...

如何使用相同的键附加另一个值？ 我想创建一个值列表（页面= 1,34,48,59 ...）然后我可以读取并循环。 或者，还有更好的方法？

Answer 1

一次指定它们，例如：

var value = ['1', '2', '3', 'n'].join(',');
document.cookie = 'key=' + value;

其中'key=' + value现在是：

key=1,2,3,n

或者，首先从cookie读取数据并添加新数据：

var keycookie = // read your cookie here
keycookie += 'new stuff';
document.cookie = 'key=' + keycookie;

Answer 2

// name is cookie name
// value is cookie value
// days is life time of it
function setCookie(name,value,days) {
var date = new Date();
date.setTime(date.getTime() + ( 1000 * 60 * 60 * 24 * parseInt(days)));

parts = $.cookie(name);
if (!parts || parts == 'undefined') {
    $.cookie(name, value, {path: '/', expires: date });
    return;
}

parts = parts.split(",");
if (parts.length > 0) {
    // search same item and delete
    // if already have , delete it
    for (var i=0; i<parts.length; i++) {
        if (value == parts[i]) {
            parts.splice(i, 1);
        }
    }
    parts.push(value);

    // if over 50, just do 50
    newparts = [];
    if (parts.length > 50) {
        for (var i=parts.length - 50; i<parts.length; i++) {
            newparts.push(parts[i]);
        }
    }
    else {
        newparts = parts;
    }
    $.cookie(name, newparts.join(","), {path: '/', expires: date });
}
else {
    $.cookie(name, $(this).attr("id"), {path: '/', expires: date });
}};