sweetalert2 versions 9.17.4 and up until 10.0.0 are vulnerable to hidden functionality that was introduced by the maintainer. The package outputs audio and/or video messages that do not pertain to the functionality of the package and is not included in versions 9.0.0 – 9.17.3.
Workaround
Use a version 9.0.0 – 9.17.3 of the package until the maintainer releases a fix.