如何使用JavaScript删除当前域的所有cookie ?


当前回答

我在这里贡献是因为这个功能将允许您删除所有cookie(匹配路径,默认为no-path或\),也包括设置为包含在子域上的cookie

function clearCookies( wildcardDomain=false, primaryDomain=true, path=null ){
  pathSegment = path ? '; path=' + path : ''
  expSegment = "=;expires=Thu, 01 Jan 1970 00:00:00 GMT"
  document.cookie.split(';').forEach(
    function(c) { 
      primaryDomain && (document.cookie = c.replace(/^ +/, "").replace(/=.*/, expSegment + pathSegment))
      wildcardDomain && (document.cookie = c.replace(/^ +/, "").replace(/=.*/, expSegment + pathSegment + '; domain=' + document.domain))
    }
  )
} 

其他回答

据我所知,没有办法对域名上的任何cookie集进行全面删除。如果知道cookie的名称,并且脚本与cookie在同一个域中,则可以清除cookie。

你可以将值设置为空,过期日期设置为过去的某个时间:

var mydate = new Date();
mydate.setTime(mydate.getTime() - 1);
document.cookie = "username=; expires=" + mydate.toGMTString(); 

这里有一篇关于使用javascript操作cookie的优秀文章。

这里有一个清除所有路径和所有变体域(www.mydomain.example, mydomain。例等):

(function () {
    var cookies = document.cookie.split("; ");
    for (var c = 0; c < cookies.length; c++) {
        var d = window.location.hostname.split(".");
        while (d.length > 0) {
            var cookieBase = encodeURIComponent(cookies[c].split(";")[0].split("=")[0]) + '=; expires=Thu, 01-Jan-1970 00:00:01 GMT; domain=' + d.join('.') + ' ;path=';
            var p = location.pathname.split('/');
            document.cookie = cookieBase + '/';
            while (p.length > 0) {
                document.cookie = cookieBase + p.join('/');
                p.pop();
            };
            d.shift();
        }
    }
})();
//Delete all cookies
function deleteAllCookies() {
    var cookies = document.cookie.split(";");
    for (var i = 0; i < cookies.length; i++) {
        var cookie = cookies[i];
        var eqPos = cookie.indexOf("=");
        var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
        document.cookie = name + '=;' +
            'expires=Thu, 01-Jan-1970 00:00:01 GMT;' +
            'path=' + '/;' +
            'domain=' + window.location.host + ';' +
            'secure=;';
    }
}

在测试了多种浏览器中列出的几乎所有方法后,我发现几乎没有一种方法能达到50%的效果。

如果需要,请帮忙纠正,但我要在这里发表我的意见。下面的方法分解了所有内容,基本上基于设置部分构建cookie值字符串,并包括路径字符串的一步一步构建,当然从/开始。

希望这对其他人有所帮助,我希望任何批评都能以完善这种方法的形式出现。起初,我想要一个简单的1-liner,因为有些人寻求,但JS cookie是那些不那么容易处理的事情之一。

;(function() {
    if (!window['deleteAllCookies'] && document['cookie']) {
        window.deleteAllCookies = function(showLog) {
            var arrCookies = document.cookie.split(';'),
                arrPaths = location.pathname.replace(/^\//, '').split('/'), //  remove leading '/' and split any existing paths
                arrTemplate = [ 'expires=Thu, 01-Jan-1970 00:00:01 GMT', 'path={path}', 'domain=' + window.location.host, 'secure=' ];  //  array of cookie settings in order tested and found most useful in establishing a "delete"
            for (var i in arrCookies) {
                var strCookie = arrCookies[i];
                if (typeof strCookie == 'string' && strCookie.indexOf('=') >= 0) {
                    var strName = strCookie.split('=')[0];  //  the cookie name
                    for (var j=1;j<=arrTemplate.length;j++) {
                        if (document.cookie.indexOf(strName) < 0) break; // if this is true, then the cookie no longer exist
                        else {
                            var strValue = strName + '=; ' + arrTemplate.slice(0, j).join('; ') + ';';  //  made using the temp array of settings, putting it together piece by piece as loop rolls on
                            if (j == 1) document.cookie = strValue;
                            else {
                                for (var k=0;k<=arrPaths.length;k++) {
                                    if (document.cookie.indexOf(strName) < 0) break; // if this is true, then the cookie no longer exist
                                    else {
                                        var strPath = arrPaths.slice(0, k).join('/') + '/'; //  builds path line 
                                        strValue = strValue.replace('{path}', strPath);
                                        document.cookie = strValue;
                                    }
                                }
                            }
                        }
                    }
                }
            }
            showLog && window['console'] && console.info && console.info("\n\tCookies Have Been Deleted!\n\tdocument.cookie = \"" + document.cookie + "\"\n");
            return document.cookie;
        }
    }
})();

一个衬套

以防你想快速粘贴进去…

document.cookie.split(";").forEach(function(c) { document.cookie = c.replace(/^ +/, "").replace(/=.*/, "=;expires=" + new Date().toUTCString() + ";path=/"); });

和bookmarklet的代码:

javascript:(function(){document.cookie.split(";").forEach(function(c) { document.cookie = c.replace(/^ +/, "").replace(/=.*/, "=;expires=" + new Date().toUTCString() + ";path=/"); }); })();