JSFiddle - React, Tailwind, and code Playground

by mischah

HTML

<p id="p">
    
</p>

JavaScript

(function() {
    var str = '31.12.2047';
    var regexp = /(0[1-9]|[12]\d|3[01])\.(0[1-9]|1[012])\.(19|20)\d{2}/;
    var found = str.match(regexp);
    console.log(found);
    document.getElementById('p').innerHTML = found;
})();