Preload fonts

functions.php

add_filter( 'astra_enable_default_fonts', 'temp_disable_astra_fonts' );
function temp_disable_astra_fonts( $load ) {
  $load = false;
  return $load;
}
add_action( 'wp_head', 'add_astra_fonts_preload', 1 );
function add_astra_fonts_preload() {
  ?>
  <link rel="preload" href="<?php echo get_site_url(); ?>/wp-content/themes/astra/assets/fonts/astra.woff" as="font" type="font/woff" crossorigin />
  <link rel="preload" href="<?php echo get_site_url(); ?>/wp-content/themes/astra/assets/fonts/astra.ttf" as="font" type="font/ttf" crossorigin />
  <link rel="preload" href="<?php echo get_site_url(); ?>/wp-content/themes/astra/assets/fonts/astra.svg#astra" as="font" type="font/svg" crossorigin />
  <style type='text/css'>
  <?php
  echo '@font-face {font-family: "Astra";src: url( ' . get_site_url() . '/wp-content/themes/astra/assets/fonts/astra.woff) format("woff"),url( ' . get_site_url() . '/wp-content/themes/astra/assets/fonts/astra.ttf) format("truetype"),url( ' . get_site_url() . '/wp-content/themes/astra/assets/fonts/astra.svg#astra) format("svg");font-weight: normal;font-style: normal;font-display: fallback;}';
  ?>
  </style>
  <?php
}