<script>
const userName = 'Ken';
const target = document.getElementById('start-button');
function sayHello(e){
console.log('Hello, ' + this.name);
};
target.addEventListener('click', {name: userName, handleEvent: sayHello});
</script>豊かな社会を創造し、新たな時代を担うべく、大きな心で邁進すべし