我可以从JavaScript修改或添加Cookie吗？ [英] Can I modify or add cookies from JavaScript?

问题描述

正确的JavaScript处理浏览器Cookie的限制是什么？例如，我可以检查是否启用了Cookie？

Exactly what are the restrictions for handling browser cookies from javascript? Can I check if cookies are enabled for example?

推荐答案

是的！ 阅读有关使用Cookie与JavaScript的优秀文章

这里是一个摘录的代码示例。

Here's an excerpted code example.

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);
}

并且测试是否启用。我喜欢jldupont的回答。

And as for testing whether they are enabled. I like jldupont's answer.

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