Thanks Nuno for saving my day. I was able to get the minor version data using 'v0' through coreservice from which am passing it to the js file. Please find below the code snippet.
Client client = new Client();
string tcmid = "tcm:222-7316-64";
IdentifiableObjectData identifiableObjectData = client.Read(tcmid, null);
if (identifiableObjectData == null) return;
FullVersionInfo fullVersionInfo = identifiableObjectData.VersionInfo as FullVersionInfo;
if (!fullVersionInfo.LockType.Value.HasFlag(LockType.NewItem))
{
client.Impersonate("NT AUTHORITY\\SYSTEM");
identifiableObjectData = client.Read(tcmid + "-v0", null);
}