How to pass parameters via ajax?

Question

PHP

there is a form:

<form method="post" action="index.php?action=add&code=<?php echo $row["code"]; ?>">
</form>

how to pass these parameters via ajax?

Answer 1

https://api.jquery.com/jquery.ajax/
$.ajax({
data: {/*array of format parameters [key: value, key2: value2]*/}
})