Adding External Fonts

To add a font that cannot be uploaded you can add a direct link to the font via the below filter:

add_filter('nectar_custom_font_list', function($fonts){
    $custom_fonts = [
        [
            "name" => "Test",
            "slug" => "my-test",
            "variations" => [
                [
                    "file_name" => "test.ttf",
                    "url" => "https://domain.com/font-files/font.ttf",
                    "fontData" => [
                        "fontStyle" => "normal",
                        "weight" => "400"
                    ]
                ]
            ]
        ]
    ];
    $merged_fonts = array_merge($fonts, $custom_fonts);
    return $merged_fonts;
});