JSFiddle - React, Tailwind, and code Playground

HTML

<form action="php/addNew.php" method="post">
    <input class="styler" type="text" name="name" size="70" maxlength="70"><br></p>
    <input class="styler" id="phone" type="text" name="phoneNumber" size="15" maxlength="15"><br></p>
    <input class="styler" type="text" name="email" size="40" maxlength="40"><br>
    <textarea class="styler"  name="order" cols="70" rows="7"></textarea>
    <input class="styler" type="text" size="19" maxlength="19" disabled="true">
    <button id="Gen" class="styler" onclick='test(); return false;'>Сгенерировать</button>
    <button id="send" class="styler" >Отправить</button>
  </form>

JavaScript

function test() {
    console.log('Сгенерировать');
}