<form action="#" class="" id="form__v1">
<br>
<input type="text" name="f_name" class="c_name" id="" placeholder="Название" value="TestValueStandart">
<br>
<input type="text" name="f_dataAtt" id="" placeholder="Дата атрибут">
<br>
<button type="submit">Отправить форму.</button>
</form>const form1 = document.querySelector('#form__v1')
const inputNamed = document.querySelector('.c_name')
const btn = document.querySelector('#form__v1 > button')
btn.addEventListener('click', (event) => {
event.preventDefault()
console.log('click btn')
})const inputNamed = document.querySelector('.c_name')