Palasthotel

greatestview

CAUTION: This plugin is now deprecated! The successor plugin is <a href="https://wordpress.org/plugins/embed-javascript-file-content/" rel="ugc">Embed JavaScript File Content</a>. The new plugin is rebuild from scratch and more rock solid: It respects order and position of scripts and extra scripts added via <code>wp_add_inline_script</code> or <code>wp_localize_script</code> don’t get lost. Give it a try!
In some cases you cannot wait for a JavaScript file to load, even if it is placed early in the <code><head></code> section of your template. You can benefit from better performance, if you place the JavaScript code directly inside a <code><script></code> tag into the header. This is where this plugin comes in: It provides a filter <code>inline_javascript_in_head_handles</code>, which takes JavaScript handles, dequeues those scripts and echos their code content inline into the head section instead of linking them via a script tag.
Please beware that placing lots of JavaScript code inline in the <code><head></code> section can be critical! First you lose caching benefits and second the document size can increase easily. A general rule of thumb is that you should only consider JavaScript files for inline placement, which are critical and which have a file size lower than ~500 Bytes.
<h4>Example</h4>
<pre><code>add_action( 'wp_enqueue_scripts', 'my_scripts' );
function my_scripts() {
 // Some critical script is enqueued
 wp_enqueue_script( 'js-detection', get_template_directory_uri() . '/js/js-detection.js' );
}

/**
 * Define JavaScript handles to be echoed inline in the html head section.
 */
add_filter( 'inline_javascript_in_head_handles', 'my_inline_javascript_in_head_handles', -20 );
function my_inline_javascript_in_head_handles( $handles ) {
 $scripts = [ 'js-detection' ];

 return array_merge( $handles, $scripts );
}
</code></pre>

Inline JavaScript in Head

Boosts performance of critical short JavaScripts by placing their content directly into the HTML head.

Serge Boyko

This plugin makes it dramatically easier to enqueue scripts and styles. 
Manage it from a separate option menu page.
You can enqueue in <code>head</code> or in <code>footer</code>, enqueue in admin dashboard, enqueue only for homepage, 
enqueue for all pages/posts/categories/archives or enqueue for a specific page/post/category.
Choose from any script/style in theme folder or from a specific plugin folder.
It has never been so easy before!

WP Enqueue

This plugin makes it dramatically easier to enqueue scripts and styles. Manage it from a separate option menu page.

Inline JavaScript in Head vs WP Enqueue