document referrer

The document referrer is a piece of information that tells you where a user came from before they landed on your website. It is typically passed along by the user's web browser and can be accessed using JavaScript. This information can be useful for understanding how users are finding your site and for tracking the effectiveness of your marketing campaigns. However, it is important to note that the referrer may not always be available or accurate, as some browsers and privacy settings may block or obscure this information.

相关问题

window.location.href = document.referrer;

引用中的代码`window.location.href = document.referrer`是用于将当前页面跳转到前一个页面，并且刷新页面。`document.referrer`表示前一个页面的URL。这段代码会判断`document.referrer`是否包含`?`，如果包含则拼接参数`&r=`，如果不包含则拼接参数`?r=`。最后通过`window.location.href`将页面跳转到前一个页面并刷新页面。

这段代码的作用是在前一个页面的基础上加上随机参数`r`来刷新页面。这样做的目的可能是为了避免缓存，确保每次跳转到前一个页面时都能重新加载内容。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [使用window.location.href和document.referrer](https://blog.csdn.net/qq_37252429/article/details/76153180)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [js返回上一页和刷新页面](https://blog.csdn.net/m0_47402657/article/details/127448104)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]

window. location.href = document.referrer的作用

这段代码的作用是将当前页面的 URL 重定向到该页面的来源网址。其中，`window.location.href` 表示页面的 URL，`document.referrer` 表示页面的来源网址。通过将当前页面的 URL 重定向到来源网址，可以实现一些特定的功能，比如返回上一级页面，或者根据来源网址做一些特定的操作。需要注意的是，该代码必须放在页面加载完成后才能执行。