JSFiddle - React, Tailwind, and code Playground

HTML

<p id="example">
  Heute ist:
</p>

JavaScript

function get_today(){ 
        var today = new Date(); 

        var day = today.getDate(); // Tag 

        // Monatsangabe startet bei 0! 
        var month = today.getMonth()+1; // Monat 

        var year = today.getFullYear(); // Jahr 
        if(day < 10) { 
                day = '0'+ day; 
        } 
        if(month < 10) { 
                month = '0'+ month; 
        } 
        today = day + '.' + month + '.' + year; 

        return today; 
} 

var today = get_today();

document.getElementById('example').textContent += today;