Integración de particles.js en WordPress con un shortcode

particles-js.php

<?php
// The shortcode only works in WordPress front page 

// Shortcode Creation
add_action( 'init', 'dcms_add_shortcode' );

function dcms_add_shortcode(){
	add_shortcode('particles-background', 'dcms_particles_background');
}

function dcms_particles_background( $atts , $content ){
	$str = '<div id="particles-js">'.$content.'</div>';
	return $str;
}

// Javascript library and configuration
add_action( 'wp_footer', 'dcms_footer_scripts' );

function dcms_footer_scripts() {
	if ( ! is_front_page() ) return;
	?>
    <script src="https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script>
	<script type="text/javascript">
		particlesJS("particles-js",
			    //Configuracion JSON
			     {"particles":{"number":{"value":80,"density":{"enable":true,"value_area":800}},"color":{"value":"#ffffff"},"shape":{"type":"circle","stroke":{"width":0,"color":"#000000"},"polygon":{"nb_sides":5},"image":{"src":"img/github.svg","width":100,"height":100}},"opacity":{"value":0.5,"random":false,"anim":{"enable":false,"speed":1,"opacity_min":0.1,"sync":false}},"size":{"value":3,"random":true,"anim":{"enable":false,"speed":40,"size_min":0.1,"sync":false}},"line_linked":{"enable":true,"distance":150,"color":"#ffffff","opacity":0.4,"width":1},"move":{"enable":true,"speed":6,"direction":"none","random":false,"straight":false,"out_mode":"out","bounce":false,"attract":{"enable":false,"rotateX":600,"rotateY":1200}}},"interactivity":{"detect_on":"canvas","events":{"onhover":{"enable":true,"mode":"repulse"},"onclick":{"enable":true,"mode":"push"},"resize":true},"modes":{"grab":{"distance":400,"line_linked":{"opacity":1}},"bubble":{"distance":400,"size":40,"duration":2,"opacity":8,"speed":3},"repulse":{"distance":200,"duration":0.4},"push":{"particles_nb":4},"remove":{"particles_nb":2}}},"retina_detect":true}
			    );
	</script>
	<?php
}

// CSS configuration
add_action( 'wp_footer', 'dcms_footer_styles' );

function dcms_footer_styles() {
	if ( ! is_front_page() ) return;
	?>
	<style>
		#particles-js {
			display: flex;
			align-items: center;
			justify-content: center;
			position: relative;
			width: 100%;
			min-height: 400px;
			height: 600px;
			background: #b61924;
		}
		#particles-js > section{
			position: absolute;
			max-width:500px;
			text-align:center;
		}
		#particles-js h1{
			font-weight:bold;
		}
		#particles-js h1,
		#particles-js h2{
			color:white;
		}

	</style>
    <?php
}