A simple CAPTCHA component that asks users to key in a few digits to prove they are human.

This component is merely a skeleton component to show the minimum needed for a widget that is implemented in JavaScript (not GWT). It uses a shared state (provided to the JavaScript end internally using the GWT compiler) that updates the client when it changes (programmatically from the server side) and a call-back mechanism from client to server.

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Link to this version
StableReleased 04 March 2016Apache License 2.0
Framework Support
Vaadin 7.0+
Vaadin 8.0+
Browser Independent
Install with
Release notes - Version 0.9

First public release as a Vaadin Add-On.