How to know if the file input has something?

Question

Good morning, everybody, okay? I’m in bad shape...

People like I can know that the guy has selected some file from pc?

Type wanted to know this answer in true or false with jquery.

For example, it appears there: [NO FILE SELECTED] Then when the guy selects something like I know who he selects?

Answer 1

Just make a check if the field has value. You can pick up by id country:

function checa(){
   var input_file = $("#file").val();
   
   if(input_file){ // retorna true se teve algum arquivo selecionado
      alert("arquivo selecionado");
   }else{
      alert("nenhum arquivo selecionado");
   }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="file" id="file" />
<br />
<input type="button" value="Verificar" onclick="checa()" />

This check is basic, works with input guy text also. Only check if there is value in the field.