Tryit Editor v2.7

Edit This Code:
<!DOCTYPE html>
<html>
<body>
<head>
<meta name="description" content="Free Web tutorials">
<meta name="keywords" content="HTML5,CSS,JavaScript">
<meta name="author" content="John Doe">

<script>
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "//hm.baidu.com/hm.js?73c27e26f610eb3c9f3feb0c75b03925";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
</head>

<p>Click the button to return the value of the name attribute of all meta elements.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var x = document.getElementsByTagName("META");
    var txt = "";
    var i;
    for (i = 0; i <x.length; i++) {
        txt = txt + "Name of "+(i+1)+". meta tag: "+x[i].name+"<br>";
    }
  
    document.getElementById("demo").innerHTML = txt;
}
</script>

</body>
</html>