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PHP

Preload Key Web Fonts

Preloads the font files used above the fold, so text appears in the right font sooner and the layout shifts less.

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Code

// Full URLs of the WOFF2 files to preload (usually one or two: body text and headings).
$wpide_preload_fonts = array(
    get_stylesheet_directory_uri() . '/assets/fonts/inter-regular.woff2',
);

add_filter( 'wp_preload_resources', function ( $resources ) use ( $wpide_preload_fonts ) {
    foreach ( $wpide_preload_fonts as $url ) {
        $resources[] = array(
            'href'        => $url,
            'as'          => 'font',
            'type'        => 'font/woff2',
            'crossorigin' => 'anonymous',
        );
    }

    return $resources;
} );

Notes

Copy the exact font URLs from your browser's Network panel and preload no more than one or two.

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