cookiejs文件编写,js生成cookie

更新：2022-11-17 22:51

本文目录一览：

1. 怎么用JS建立一个cookie?
2. 用JS编写cookie传值问题
3. 用原js写获取本地cookie的方法
4. js操作cookie
5. 用JS编写Cookies保存用户名和密码代码

怎么用JS建立一个cookie?

01 script language="JavaScript" type="text/javascript"
02 <!--
03 document.cookie="id=12"; // 创建cookie的键和值
04 document.cookie="user=yx"; // 创建cookie的键和值
05 var strCookie=document.cookie; // 获取该域名下的所有cookie值
06 alert(strCookie); // 显示所有的cookie的键与值
07 //-->
08 /script

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用JS编写cookie传值问题

JS设置cookie: 假设在A页面中要保存变量username的值("jack")到cookie中,key值为name，则相应的JS代码为：

document.cookie="name="+username;

JS读取cookie: 假设cookie中存储的内容为：name=jack;password=123 则在B页面中获取变量username的值的JS代码如下：

var username=document.cookie.split(";")[0].split("=")[1];

用原js写获取本地cookie的方法

function get(cookie){
    let cookieValue=null;
    let cookies=document.cookie.split(';');
    for(var i=0; i < cookies.length; i++){
        let cookie=cookies[i].trim(); // 去掉前后的空格
        if(cookie.substring(0,name.length+1)==(name+'=')){
            cookieValue=decodeURIComponent(cookie.substring(name.length+1));
            break;
        }
    }
    return cookieValue;
}

js操作cookie

<!-- 网页引用 -->
<script language="javascript" src="./js/cookie.js"></script>

// 取cookie值
var hrckdeptcode = Cookie("hrckdeptcode");
var hrckdeptname = Cookie("hrckdeptname");
// 保存cookie值
setCookie("hrckdeptcode", deptcode, expdate, "/", null, false);
setCookie("hrckdeptname", deptname, expdate, "/", null, false);

把下面的脚本放到 cookie.js 文件里：

var expdate = new Date();
function getCookieVal(offset) {
    var endstr = document.cookie.indexOf(";", offset);
    if (endstr == -1) endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
}
function Cookie(name) {
    var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen) {
        var j = i + alen;
        if (document.cookie.substring(i, j) == arg) return getCookieVal(j);
        i = document.cookie.indexOf(" ", i) + 1;
        if (i == 0) break;
    }
    return null;
}
function setCookie(name, value, expires, path, domain, secure) {
    expdate.setTime(expdate.getTime() + (24*60*60*1000*365));
    document.cookie = name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}
function deleteCookie(name) {
    expdate = new Date();
    expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
    setCookie(name, "", expdate);
}

用JS编写Cookies保存用户名和密码代码

// 创建cookie
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=/";
}
// 读取cookie值
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;
}
// 清空cookie
function eraseCookie(name) {
    createCookie(name, "", -1);
}