I would like to know how to create input fields according to the value I add in a field.
Ex: I have a field of type number that has a minimum value of 1 the maximum value of 4 and the default value is 1:
<input type="number" min="1" max="4" value="1" />
Since the default field value is 1, an input field must be created, but if the user changes this value to 3, 2 more fields must be created totaling 3 fields.
You need an event sink in the input that indicates the amount of inputs, and when this value changes you can check how many inputs there are. I suggest you change name="ncamisa" to name="ncamisa[]" so that PHP can read these inputs in the same array.
I also suggest giving this input type="numbver" to find it more easily.
$('#numeros').on('change', function () {
var nr = parseInt(this.value, 10);
var inputs = $('[name="ncamisa[]"]');
var dif = inputs.length - nr;
if (dif < 0) {
var input = inputs.eq(0).clone().attr('id', '');
while (dif++ < 0) $(document.body).append(input)
} else if (dif > 0) {
inputs.each(function (i) {
if (i >= nr) this.remove();
});
}
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script><inputid="numeros" type="number" min="1" max="4" value="1" />
<input type="text" class="form-control" id="ncamisa" name="ncamisa[]" placeholder="Tamanho da(s) camisa">