js selezionare il valore di modifica
document.getElementById('my-select').addEventListener('change', function() {
console.log('You selected: ', this.value);
});
casella di testo html js sul cambiamento
<!--
You can use any of the following:
onkeydown, onkeyup or onchange
-->
<input type="text" onkeydown="keydownFunction()"
onkeyup="keyupFunction()" onchange="changeFunction()">
onchange su seleziona tag
<select id="comboA" onchange="getComboA(this)">
<option value="">Select combo</option>
<option value="Value1">Text1</option>
<option value="Value2">Text2</option>
<option value="Value3">Text3</option>
</select>
onchange js
<script>
document.getElementById("fname").addEventListener("change", myFunction);
function myFunction() {
var x = document.getElementById("fname");
x.value = x.value.toUpperCase();
}
</script>
ingresso onchange continuamente
<span id="valBox"></span>
<input type="range" min="5" max="10" step="1"
oninput="showVal(this.value)" onchange="showVal(this.value)">
ingresso javascript onchange ottenere valore
var element = document.getElementById("myInput");
element.onchange = function() {
console.log(element.value);
}