JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="sometext"></textarea>
<meter value="10" min="0" max="160" id="somemeter">2 out of 160</meter>

JavaScript

(function() {
    var textarea = document.getElementById('sometext');
    var meter = document.getElementById('somemeter');
    
    var theLength = 0;
    
    textarea.addEventListener('keypress', function() {
        theLength = textarea.value.length;
    
        if (theLength > 160) {
            theLength = 160;
        }

        meter.value = theLength;
    });
})();