JSFiddle - React, Tailwind, and code Playground

HTML

<form id='acf_1000'>
 <input type="tel" name="tel_1001" class="tel" placeholder="Введите телефон (8 знаков)" maxlength="8" value="tel">
 <input type="text" name="text_1002" class="text" placeholder="Ваше имя" required>
 <input type="text" name="text_1003" class="text" placeholder="Ваша фамилия" >
 <textarea name="textarea_1004" class="textarea" value="Дефолтный текст" cols="30" rows="10"></textarea>
 <input type="submit">
 </form>'

JavaScript

$('#acf_1000').submit(function(){
    var params = $(this).serializeArray();
    alert(params[0].value);
    return false;
});