We can't extract the session ID using JavaScript, because the Liferay.ThemeDisplay.getSessionId() function consistently returns an empty string.
Environment
Liferay DXP 7.4
Resolution
By default, the Liferay.ThemeDisplay.getSessionId() function will always return a blank string. To change this, you need to adjust your settings.
This is how you can resolve the issue:
You need to set the property 'session.enable.url.with.session.id' to 'true' within the portal-ext.properties file.
Once this change is made, the session ID can be retrieved using the Liferay.ThemeDisplay.getSessionId() function.
Additional Information
While this solution will allow you to retrieve the session ID, it's crucial to understand the potential risk involved:
The 'session.enable.url.with.session.id' property is usually set to 'false' to safeguard against potential security risks associated with session IDs being visible.
Keeping session identifiers in cookies is generally safer and more efficient.
This is because if a session ID is attached to a URL, there's a risk that if you share that URL, you could inadvertently share your session with the recipient if the code doesn't manage this scenario appropriately.
