We added the
liff.getLineVersion() method and the
liff.id property to LIFF v2.
liff.getLineVersion() allows you to get the user's LINE version.
If a user opens the LIFF app using the LIFF browser, the LINE version of the user is returned as a string. If a user opens the LIFF app using an external browser,
null is returned.
liff.id is the property that holds the LIFF app ID (String type) passed to