The applet sent in WeChat was closed before it was opened. Will it leak information?

It usually doesn't leak. Wechat applets, like ordinary applications, need to be reviewed by the WeChat platform before they can go online. Therefore, the quality and security of WeChat applets have been guaranteed to a certain extent. In addition, WeChat applet adopts sandbox mechanism, which can effectively isolate the interaction between applet and WeChat system and protect users' privacy and security. At the same time, the WeChat platform will also conduct security tests on applets to ensure that applets have no malicious code or other security issues.