<!-- You can use any of the following: onkeydown, onkeyup or onchange --> <input type="text" onkeydown="keydownFunction()" onkeyup="keyupFunction()" onchange="changeFunction()">
var element = document.getElementById("myInput"); element.onchange = function() { console.log(element.value); }
const handleChange = (event) => { console.log(event.target.value); }; ... <input type="text" onChange={handleChange} />