Best usage of ibmcfg object in java-script

Use-case :-  In java-script under many instances we will be requiring portal context for secure or non secured or username or pageId etc. We do some operations to get these values but we need to realize that these javascript objects are constructed and readily available to use.

Example :-  

to get username -> ibmcfg.themeConfig.userName
to get currentpageid ->  ibmcfg.portalConfig.currentPageOID
current portal context -> ibmcfg.portalURI