Short script in HTML5 document doesn't work

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Script doesn't work. I want to make "tiposDeFrutas" visible with display attribute when I click over "nombreDeLista". I also add the CSS document. ............................................................................................................................................................................

<pre lang="HTML"><!DOCTYPE html>
<html>
<head>
<title>Pruebas HTML</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel=StyleSheet href="newcss.css" type="text/css" media=screen>
<script>
document.onload = function () {
document.getElementById("nombreDeLista").onclick = function () {
document.getElementsByClassName("tiposDeFrutas").style.display = "block";
};
};
</script>
</head>
<body>
<div id="nombreDeLista">Frutas</div>
<div class="tiposDeFrutas">Pera</div>
<div class="tiposDeFrutas">Limón</div>
</body>
</html>
____________________

.tiposDeFrutas {
display: none;
}

What I have tried:

................................................................................................................................................................................

Posted 10-Jan-18 7:32am

Member 13616607

Updated 10-Jan-18 8:20am

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A_Griffin · Answer 1 · 2018-01-10T08:19:00

1. use window.onload

2. getElementsByClassName returns an array, so you need to loop through that to get the elements

so...

JavaScript

window.onload = function () {
      document.getElementById("nombreDeLista").onclick = function () {
         var arr = document.getElementsByClassName("tiposDeFrutas");
         for (var i = 0; i < arr.length; i++) {
            arr[i].style.display = 'block';
         }
      }
   }