JSFiddle - React, Tailwind, and code Playground

by Aleksandr Seryakov

HTML

<input type="text"'>
<hr>
<div class="msg"></div>

JavaScript

let input = document.querySelector('input');
let msg = document.querySelector('.msg');

input.addEventListener('keyup', function(e) {
	let result = e.target.value.match( /всем/i );
  
  if (result) {
  	msg.innerHTML = `Найдено совпадение: ${result}`;
  } else {
  	msg.innerHTML = `Совпадений не найдено`;
  }
});