Belief

Believe that you can – and you can! Belief is one of the most powerful of all problem dissolvers. When you believe a difficulty can be overcome, you are more than half-way to victory over it already! (Norman Vincent Peale,

function isCalendlyEvent(e) { return e.data.event && e.data.event.indexOf('calendly') === 0; }; window.addEventListener( 'message', function(e) { if (isCalendlyEvent(e)) { console.log(e.data); } } );