The previous escape was for Text into HTML and breaks script contents. The new escaping ensures that the script contents cannot prematurely close the host script tag by escaping script open and close string sequences using a unicode escape substitution.

the escaping of this function does is tailored to the specific use case of how bootstrapScriptContent is currently set up and having it be a module suggests it is meant for a more general than it has been considered for.

Additionally the tests were redone to focus on practical implications for what is and is not escaped