functions.php

<?php
function easy_does_it_scripts() {
	wp_enqueue_style(
		'easy-does-it-style',
		get_stylesheet_uri()
	);
	wp_enqueue_script(
		'easy-does-it-script',
		'./script.js',
		array('jquery'), 1.1,
		array(
			'strategy' => 'defer',
		)
	);
	add_editor_style();
}
add_action( 'wp_enqueue_scripts', 'easy_does_it_scripts' );

function register_easy_does_it_menus() {
	register_nav_menus(
		array(
			'header-menu' => __( 'Header Menu' ),
			'footer-menu' => __( 'Footer Menu' )
		)
	);
}
add_action( 'init', 'register_easy_does_it_menus' );

// Allow SVG
add_filter( 'wp_check_filetype_and_ext', function($data, $file, $filename, $mimes) {

	global $wp_version;
	if ( $wp_version !== '4.7.1' ) {
	   return $data;
	}
  
	$filetype = wp_check_filetype( $filename, $mimes );
  
	return [
		'ext'             => $filetype['ext'],
		'type'            => $filetype['type'],
		'proper_filename' => $data['proper_filename']
	];
  
  }, 10, 4 );
  
  function cc_mime_types( $mimes ){
	$mimes['svg'] = 'image/svg+xml';
	return $mimes;
  }
  add_filter( 'upload_mimes', 'cc_mime_types' );
  
  function fix_svg() {
	echo '<style type="text/css">
		  .attachment-266x266, .thumbnail img {
			   width: 100% !important;
			   height: auto !important;
		  }
		  </style>';
  }
  add_action( 'admin_head', 'fix_svg' );
?>