About the "DBCache" class

[Yang Lei]

The following import statement is in the Tinode SDK source file (https://github.com/tinode/tinode-js/blob/master/src/tinode.js) 

import DBCache from './db.js';

but there is no DBCache class at all in the db.js (https://github.com/tinode/tinode-js/blob/master/src/db.js)

is it mistake?

[Gene]

Yes, you don't understand the semantics of JS import statement. Please read the manual

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import

 

[Yang Lei]

Thank you a lot for the patient guidance.

I would argue it is really not a "good part" of Javascript or any other languages though. 

import * as newname from ,  or import thesame from , would be a lot of easier to understand.