How to clear the cache when vue updates the page

When developing a Vue project, as the code is constantly updated and the page is constantly refreshed, some caching problems will occur. These caching issues may cause pages to not display correctly or error messages to appear. Therefore, it is very important to clear the cache when updating the Vue page.

1. Understand the caching mechanism

Before talking about clearing the cache, we need to first understand the browser caching mechanism. When the browser accesses the page for the first time, it will store some data of the page in the local cache, so that the next time it visits again, it can directly obtain the data from the local cache, thereby speeding up the page loading speed.

Browser caching mechanisms include two types: strong caching and negotiation caching. Among them, strong caching is achieved by setting Expires or Cache-Control in the HTTP response header, which determines whether the client directly uses the local cache. The negotiated cache is achieved by setting If-Modified-Since or If-None-Match in the HTTP request header, which is used to confirm with the server whether the local cache has expired.

2. How to clear the cache

Now let’s take a look at how to clear the cache. Here are several common methods:

2.1. Use Ctrl F5 to refresh the page

This is the simplest and most direct method. Use Ctrl F5 to refresh the page. You can quickly clear the browser cache and re-request the server to obtain new resources, thereby updating the page.

2.2. Clear the browser cache

In the Chrome browser, you can clear the browser cache by clicking "Settings-Privacy and Security-Clear Browsing Data"; in the Firefox browser , you can clear the browser cache by clicking "Options-Privacy & Security-Clear your recent browsing history".

2.3. Modify the request link

In Vue development, you can clear the cache by modifying the request link. For example, when requesting data using axios, we can add a random number after the URL to redirect the request and avoid using cache. The sample code is as follows:

axios.get('/api/data?t=' + Math.random()).then(function(response) {
  console.log(response.data);
});

2.4. Set the response header

We can also set the HTTP response header to let the browser go to the server to request the latest data every time it is requested. For example, you can use the following response header to set Cache-Control to no-cache:

response.setHeader('Cache-Control', 'no-cache');

3. Summary

When developing a Vue project, clearing the cache is very important and can be avoided Some pages display abnormally or errors occur. In actual development, we can choose different methods to clear the cache according to specific circumstances, such as using Ctrl F5 to refresh the page, clear the browser cache, modify the request link, etc. Hope this article helps you!

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