i can't able to use add classlist function in javascript.. this is my html code
<div class="container">
<h1><i class="fa fa-archway"> DJ Party!</i></a></h1>
<h2>Get the party feel <i class="fa fa-air-freshener">
Anywhere,Anytime</i></h2>
this is my javascript code
var h2=document.getElementsByTagName("h2");
h2.classList.add("font");
and this is my css code
.font
{
font-size: 500px;
padding: 400px;
}