Calling an application by the bundle signature using JXA (macOS)

Question

When calling an application using JXA (JavaScript for automation), you can refer to the app by the bundle name or by the identifier, just like in AppleScript:

tell application "TextEdit" to activate
tell application id "com.apple.TextEdit" to activate

are equivalent to

Application('TextEdit').activate();
Application('com.apple.TextEdit').activate();

But in AppleScript one can also call an app by the bundle signature, which is often version-invariant and stable over time:

tell application id "ttxt" to activate

What is the JXA equivalent of this latter call? How can one create version-independent JXA scripts?