WordPress Media Upload

functions.php

<?php 
/**
 * Require File To Media Upload
 */

add_action("admin_enqueue_scripts", function() {
	wp_enqueue_media();
	wp_enqueue_script('feature-upload-script', get_template_directory_uri().'/upload.js', array( 'jquery' ), true, true) ;
});

upload.js

;(function($) {
	$('#upload_logo').on('click', function(e) {
		e.preventDefault();

		var that = wp.media({
			title: 'Upload Logo',
			button: {
				text: 'Insert Logo'
			},
			multiple: false
		}).open().on('select', function() {
			var attachment = that.state().get('selection').first().toJSON();
      
			//$('.image-container').html('<img src="'+ attachment.url +'" style="max-width: 100%;">');
			//$('#hs_logo').val(attachment.url);
		})

	});

})(jQuery);