cookie增删改查方法

/**
 * 设置cookie
 * @param {
    *cookie名称} name
 * @param {
    *cookie值} value
 */
function setCookie(name, value, old_expires) {
    

    var argv = arguments;
    var argc = arguments.length;
    var expires = (argc > 2) ? argv[2] : null;
    if (expires != null) {
    
        var LargeExpDate = new Date();
        LargeExpDate.setTime(LargeExpDate.getTime() + (expires * 1000 * 3600 * 24));
    }
    document.cookie = name + "=" + escape(value) + ((expires == null) ? "" : (";path=/;expires=" + LargeExpDate.toGMTString()));
}

/**
 * 读取cookie
 * @param {
    *cookie名称} Name
 */
function getCookie(Name) {
    
    var search = Name + "="
    if (document.cookie.length > 0) {
    
        var offset = document.cookie.indexOf(search)
        if (offset != -1) {
    
            offset += search.length
            var end = document.cookie.indexOf(";", offset)
            if (end == -1) end = document.cookie.length
            return unescape(document.cookie.substring(offset, end))
        }
        else return ""
    }
}

/**
 * 删除cookie
 * @param {
    *cookie名称} name
 */
function deleteCookie(name) {
    
    var expdate = new Date();
    expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
    setCookie(name, "", expdate);
}

function clearCookie(){
    
    var keys=document.cookie.match(/[^ =;]+(?=\=)/g);
    if (keys) {
    
        for (var i = keys.length; i--;)
        document.cookie=keys[i]+'=0;expires=' + new Date( 0).toUTCString()
    }
}

export {
     setCookie, getCookie, deleteCookie,clearCookie }