the component vaadin 8 chart charge for one time I buy it or needed to pay for each time I launch the softeware ?
If it validate when I realease the softeware in many different computer?or every computer needed to buy one?
You need a license during development time. The license checker is run when you build the project, for example with mvn install. You need one license per developer, the amount of computers is not related. For example, if you’re the single developer, you can use the same license for your development computer and one for the integration server which runs the build job. Running the application in production does not require a license.
-Olli