Greetings, I have a select box (id_encuentros) and I need to know how many elements have been selected to restrict it, that is, if you have selected more than one option, then I would show you an alert message.
Does anyone know how to do it in javascript or jquery?
Thank you.
In the end I found the solution, in case someone is worth it:
<script>
function myFunction() {
var count = $("#id_acciones :selected").length;
if(count>1) {
alert("Solo puede seleccionar un curso")
}
}
</script>
Thanks for your help!
It would be a bit of code on your part to put something more concrete, but with jQuery you can do something like this:
$(':checked').size()
Be sure to restrict the elements by input, by name, by some type of attribute, etc.
Reference: link