JSFiddle - React, Tailwind, and code Playground

HTML

<button>Кнопка</button>

<hr>

<label>
  <input type="file" hidden>
  
  Инпут
</label>

JavaScript

$('button').on('click', function(){
	
  $.post('/echo/json/', {
  	price: 100
  })
  .done(function(result){
  	
    $('input').click();
    
  });
  
});