This example app shows a basic client and server setup to use the Watson JS SDK in a client-side context.
The example here uses express to serve the content and express-browserify to generate the client-side bundle.
A server-side component is required to generate auth tokens for services that use a username/password combo. (This is all services except Alchemy and Visual Recognition which use API keys instead.)
Not all Watson services currently support CORS, and in some cases, certain methods work while others do not. Below is a partial list of service support:
The following services support CORS
- Tradeoff Analytics
- Tone Analyzer
- Speech to Text*
- Text to Speech*
- Personality Insights
- Document Conversion
- Visual Recognition (
version=2018-03-19) - All Alchemy services
* Speech to Text and Text to Speech should be usable via the Node.js SDK, but we also have a Speech JavaScript SDK that was specifically written for browser support.
The following services do not support CORS
- Language Translator
- Visual Recognition (partial support)
- Retrieve and Rank