Register and Enqueue FontIcons, using native WordPress function

kat-fonticon

 // Register fonticon script
wp_register_script( 'kat-fonticon', 'https://use.fonticons.com/91a2525c.js', array(), null, false );

//* Enqueue scrip with Altitude Pro theme
add_action( 'wp_enqueue_scripts', 'kat_enqueue_scripts_styles' );
function kat_enqueue_scripts_styles() {

wp_enqueue_script( 'kat-fonticon' );
// Add other scripts and/or CSS here if it has already been registered
}

km-fonticon.php

 // Register fonticon script
wp_register_script( 'kat-fonticon', 'https://use.fonticons.com/91a2525c.js', array(), null, false );

//* Enqueue scripts and styles
add_action( 'wp_enqueue_scripts', 'kat_enqueue_scripts_styles' );
functionkat_enqueue_scripts_styles() {

wp_enqueue_script( 'kat-fonticon' );
// Add other scripts and/or CSS here if it has already been registered
}