JSFiddle - React, Tailwind, and code Playground

HTML

<h1 id="greeting"></h1>

JavaScript

console.time('greeting');
var current_date = new Date().getHours();
var greeting = 'Goedenacht';

if(current_date >= 6) {
    if(current_date >= 12) {
        if(current_date >= 18) {
            greeting = 'Goedenavond';
        } else {
            greeting = 'Goedemiddag';
        }
    } else {
        greeting = 'Goedemorgen';
    }
}
console.timeEnd('greeting');
document.getElementById('greeting').innerHTML = greeting + ', welkom op mijn website!';