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aguilar1181/wp-preload.php

Last active February 11, 2023 20:50
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add to WordPress themes functions.php to preload assets without a plugin
Raw
wp-preload.php
<?php
/**
* Preloading WordPress assets without a plugin.
* Change function name to something more unique.
* Priority is set to 0 to include as high in the <head> DOM as possible. Change priority if needed.
* Use WordPress is_page() to target specific page or is_front_page() to target ONLY homepage as in Option #1
* If asset needs to be preloaded globally use Option #2.
* For multiple assets clone the link tag instead of the entire echo block.
* Change 'as' attribute accordingly. Values for 'as' can be found here https://developer.mozilla.org/en-US/docs/Web/HTML/Element/link#attr-as.
* Use abolute paths. For external assets paste the url, for internal assets use WordPress functions to construct URL.
*/
add_action('wp_head', 'my_preloads', 0);
function my_preloads() {
// Option #1
if ( is_front_page() ) {
echo '
<link rel="preload" as="image" href="ABSOLUTE_PATH_TO_ASSET">';
}
// Option #2
echo '
<link rel="preload" as="image" href="ABSOLUTE_PATH_TO_ASSET">
<link rel="preload" as="font" href="ABSOLUTE_PATH_TO_ASSET">
<link rel="preload" as="script" href="ABSOLUTE_PATH_TO_ASSET">
';
}
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