JSFiddle - React, Tailwind, and code Playground

HTML

<textarea onkeypress="return noenter(event)"></textarea>

CSS

textarea { width:300px; height:200px; }

JavaScript

function noenter(e) {
    e = e || window.event;
    var key = e.keyCode || e.charCode;
    alert('e.type: ' + e.type + '; key: ' + key);
    return key !== 13; 
}