reactive-handebars-examp1.js

// updates the DOM as well
ReactiveHbs.set('counter', counter.get() + 1);
// Observer
ReactiveHbs.reactOnChange('counter', { debounce: 1000 }, (tpl) => {
    console.log( 'counter have been changed ' );
    console.log( 'value', tpl.get('counter') );        
});