JSFiddle - React, Tailwind, and code Playground

by oscard

HTML

<form action="" method="post" id="frm_test">
    <input type="text" name="card[]" value="" />
    <input type="text" name="card[]" value="" />
    <input type="text" name="card[]" value="" />
    <input type="submit" value="ok" />
</form>

JavaScript

$("#frm_test").submit(function (e) {
    var n = $("input[name^='card']").length;
    var array = $("input[name^='card']");
    card_value = "";
    for (i = 0; i < n; i++) {
        card_value += array.eq(i).val() + ',';
    }
    alert('user_id :'+ card_value);
    e.preventDefault();
});