我试图根据cookie存在创建重定向。因此,当用户首次连接到我的网站jonathanstevens.org
时,系统会将其重定向到jonathanstevens.org/landing
代码部分:
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
Global.js
function create_cookie(name, value, days) {
var expires = "";
if (days) {
var date = new Date();
date.setTime( date.getTime() + (days*24*60*60*1000) );
expires = "; expires=" + date.toGMTString();
}
document.cookie = name + "=" + value + expires + "; path=/";
}
function get_cookie(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;
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
&#13;
的index.html
<!-- redirect to landing page -->
<script>
// Redirect to landing page if 'form_submitted' cookie does not exist
if (get_cookie('secondvisit') === 'undefined') {
window.location.href = "landing.html";
}
</script>
&#13;
landing.html上
<!-- Adds second Visit cookie -->
<script>
jQuery(document).ready(function($) {
// Create cookie so that the user is no longer redirected
create_cookie('secondvisit', 'true', 30);
});
</script>
&#13;
预期的结果是检查Cookie,然后将其转发到我的目标网页(如果尚未定义)。关于我做错了什么的想法?
答案 0 :(得分:0)
当你从函数null
undefined
时,你应该与null
而不是get_cookie
进行比较
的index.html
<!-- redirect to landing page -->
<script>
// Redirect to landing page if 'form_submitted' cookie does not exist
if (get_cookie('secondvisit') === null) {
window.location.href = "landing.html";
}
</script>
除此之外,你应该使用这个library非常好的一个,易于使用,见下文
创建一个在整个网站上有效的Cookie:
Cookies.set('name', 'value');
创建一个从现在起7天后过期的Cookie,在整个网站上有效:
Cookies.set('name', 'value', { expires: 7 });
创建一个过期的Cookie,对当前页面的路径有效:
Cookies.set('name', 'value', { expires: 7, path: '' });
读取Cookie:
Cookies.get('name'); // => 'value'
Cookies.get('nothing'); // => undefined
阅读所有可见的Cookie:
Cookies.get(); // => { name: 'value' }
删除Cookie:
Cookies.remove('name');
删除对当前页面路径有效的Cookie:
Cookies.set('name', 'value', { path: '' });
Cookies.remove('name'); // fail!
Cookies.remove('name', { path: '' }); // removed!
修改强>
使用js.cookie
库的代码转换版本如下所示。
(注意:我已经测试了这段代码,它运行正常,请确保您正确包含库,并且控制台上没有错误。)
<强>的index.html 强>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js"></script>
<!-- redirect to landing page -->
<script>
$(document).ready(function () {
if (typeof Cookies.get('secondvisit') === 'undefined') {
window.location.href = "landing.html";
}
})
// Redirect to landing page if 'form_submitted' cookie does not exist
</script>
<强> landing.html上强>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js"></script>
<!-- Adds second Visit cookie -->
<script>
jQuery(document).ready(function () {
// Create cookie so that the user is no longer redirected
var a = Cookies.set('secondvisit', 'true', {
expires: 7
});
});
</script>