treehouse bootstrap to wp

//wp-bootstrap-navwalker
https://github.com/twittem/wp-bootstrap-navwalker

// reset when multiple loop needed
<?php rewind_posts(); ?>

// conditional call back sidebar
<?php if ( ! dynamic_sidebar( 'sibebar-name' ) ): ?>

// conditional page query
<?php if ( have_post() ) : while ( have_post() ) : the_post(); ?>

<!-- page title -->
<div class="page-header">
	<h1><?php the_title();?></h1>
</div>

<?php the_content();?>

<!-- conditiona -->
<?php endwhile; else: ?>

<div class="page-header">
	<h1>Opps!</h1>
</div>

<p>No content is appearing for this page!</p>

<?php endif;?>

<!-- add style -->
<?php
function theme_styles(){

	wp_enqueue_style( 'name_of_file', get_template_directory_uri(). 'css/bootstrap.css' );
	wp_enqueue_style( 'another_name_of_file', get_template_directory_uri(). 'css/style.css' );

}
add_action('wp_enqueue_script','theme_styles');

?>

<!-- conditional js for older IE -->
<!-- load js properly -->

<?php

function theme_js(){

global $wp_scripts;

wp_register_script('html5_shivshiv','https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js','','',false);
wp_register_script('respond_js','https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js','','',false);

$wp_scripts->add_data( 'html5_shivshiv', 'conditional', 'lt IE 9' );
$wp_scripts->add_data( 'respond_js', 'conditional', 'lt IE 9' );

wp_enqueue_script('bootstrap_js',get_template_directory_uri().'js/bootstrap.js',array('jquery'),'',true);

}
add_action('wp_enqueue_script','theme_js');

?>