Textarea count down caracter



    function evCount() { 

    var caracter = document.querySelector("#textarea"); 

    var counter = document.querySelector("#counter"); 

    var max = caracter.maxLength; 

    counter.innerHTML = max - caracter.value.length; 

    if(counter.innerHTML == 0) { 

    counter.style.display = "none"; 

    } else { 

    counter.style.display = "block"; 

    } 

    }