好程序员web前端分享js实现实战案例

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好程序员web前端分享js实现实战案例，实际开发中有要求用户一些行为每天一次，次日开始重新回复功能，一般前端都是通过cookie来记住用户的操作，然后进行判断当日是否还有机会，这时候需要给存储的cookie值一个有效期，让次日自动失效，重新计数，代码如下：

 

cookie = {

 

    /**

     * 获取cookie

     */

    get: function (name) {

        var cookieName = encodeURIComponent(name) + ‘=‘,

            cookieStart = document.cookie.indexOf(cookieName),

            cookieValue = null;

        if (~cookieStart) {

            var cookieEnd = document.cookie.indexOf(‘;‘, cookieStart);

            if (!~cookieEnd) {

                cookieEnd = document.cookie.length;

            }

            cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));

        }

        return cookieValue;

    },

    /**

     * 设置cookie

     */

    set: function (name, value, expires, path, domain, secure) {

        var cookie = encodeURIComponent(name) + ‘=‘ + encodeURIComponent(value);

        expires instanceof Date && (cookie += ‘; expires=‘ + expires.toGMTString());

        path && (cookie += ‘; path=‘ + path);

        domain && (cookie += ‘; domain=‘ + domain);

        secure && (cookie += ‘; secure‘);

        document.cookie = cookie;

    },

    /**

     * 删除cookie

     * javascript里，没有提供直接删除cookie的api，只有通过将过期时间，

     * 设置成过去的某个时间，让cookie过期，来删除。

     */

    del: function (name, path, domain, secure) {

        this.set(name, ‘‘, new Date(0), path, domain, secure);

    }

}

 

 

下面是存储cookie并设置有效期：

 

//cookie过期时间，次日凌晨

var expires = new Date(new Date(new Date().getTime() + 30*24 * 60 * 60 * 1000).setHours(0, 0, 0, 0));

 

//需要存储的cookie值

var value=‘100‘

cookie.set("key", value, expires);

转载于:https://my.oschina.net/530504/blog/3036082