JSFiddle - React, Tailwind, and code Playground
by zhukovroman
HTML
Тестовый input: <input onkeypress="javascript:return false;" id="txtChar" onkeydown="javascript:return displayKeyCode(event)" type="text" name="txtChar">
JavaScript
function displayKeyCode(evt) {
var textBox = document.getElementById('txtChar');
var charCode = (evt.which) ? evt.which : event.keyCode;
textBox.value = String.fromCharCode(charCode);
return false;
}