为什么不在 Javascript 中保存 cookie?

Why is not saved cookies in Javascript?

我有一个向用户显示临时消息的网站。此消息应如下所示:

我需要在用户点击关闭按钮 (.info-close) 面板时存储一个 cookie,以便在该面板不显示后再次更新。

我在 jsfiddle 上有问题。

$(document).ready(function(){
    
    var $close = $("#info-panel .info-close");
    var $info_panel = $("#info-panel");
    var $site_main = $(".site-main");
    
    $close.click(function(){
        $info_panel.slideUp();
        $info_panel.addClass("closed");
        // set cookie
        document.cookie = "1";
        // save cookie to "$yes_closed"
        var $yes_closed = document.cookie;
    });
    
    $(window).scroll(function() {
        // if panel has class closed, after click on "X" > dont open
        // or if in cookie "$yes_closed" is save "1" > dont open
        if ($info_panel.hasClass("closed")) {
            $info_panel.hide();
        } else {
            if ($(this).scrollTop() > 0) {
                $info_panel.slideUp();
            } else {
                $info_panel.slideDown();
            }
        }
    
    });
    
});
#info-panel {
    padding: 4px 8px;
    background: yellow;
}

.info-close {
    padding: 5px;
    background: blue;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<br/><br/><br/>

<div id="info-panel">
  <div class="info-text">You are reading documentation for version 9.0.1. Documentation for earlier versions is available as pdfs here.</div>
  <div class="info-close">X</div>
 </div>

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<p>"Hello my friend"</p>

It is because the cookie is not set properly. You need to add a cookie name and assign value to it. On page load do check if the cookie is set. Based on that show the message.

I have your code fixed here in the jsfiddle. Take a look.

http://jsfiddle.net/ssbiswal1987/9bhnyxwn/