templ-model is a web component that enables a declarative, HTML-based markup language to instantiate, and update, a JavaScript object, together with a view that is bound to the JavaScript object by way of Template Instantiation syntax.
An implementation of the TemplateInstance proposal (https://github.com/w3c/webcomponents/blob/159b1600bab02fe9cd794825440a98537d53b389/proposals/Template-Instantiation.md)