header.php

<!doctype html>
<html class="no-js" lang="">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title><?php wp_title(); ?></title>
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <?php wp_head(); ?>
    </head>
    <body <?php body_class(); ?>>
        <header>
            <?php wp_nav_menu( apply_filters( 'primary_nav_menu_args', array() ) ); ?>
        </header>