Why did the small window become blank after scanning the QR code on WeChat? How to solve it?

The WeChat scan code to log in the small window becomes blank? Easy to solve!

During the WeChat scan code login process, sometimes the small window after scanning the code will appear, and the main page cannot be refreshed. This article analyzes the causes and provides solutions to help you quickly resolve this problem.

Problem: The window is blank after scanning the code, and the page is not refreshed

After the user logs in with WeChat scan code, the backend (Django) returns the following response:

 <code>httpresponse("window.opener.location.reload();window.close();", content-type="text/html; charset=utf-8 ")</code>

But the small window became blank, not closed, and the main page was not refreshed. This issue only occurs on specific websites.

Cause analysis

1. The response format is not standardized: directly return JavaScript code, and the browser may not be able to parse and execute correctly.
2. Cross-domain restrictions: The main page and pop-up may not be under the same domain name, causing cross-domain restrictions to prevent script execution.
3. Browser settings or plug-in interference: Browser plug-ins or settings may prevent scripts from running.

Solution

1. Optimize response format: Embed JavaScript code into HTML structure to ensure that the browser parses correctly:

   <code> httpresponse(""" 
    <code> httpresponse(""" 
        <meta charset="UTF-8">
        <title>Redirecting...</title>
    
    
        <script>
            window.opener.location.reload();
            window.close();
        </script>
    
    </code></code>

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