UpsellWP: Add Custom offer template

UpsellWP: Add Custom offer template

add_filter('cuw_templates', function ($templates) {
    $templates['offer/custom-template-1'] = [
        'title' => '{discount} offer',
        'description' => 'Hey there, you can get this offer by just clicking the checkbox below to add this offer to your order, you will never get such a discount on any other place on this site.',
        'cta_text' => 'Get this exclusive offer now !',
        'image_id' => 0,
        'styles' => [
            'template' => ['border-width' => 'medium', 'border-style' => 'dashed', 'border-color' => '#c3c4c7', 'background-color' => '#fbfbfb'],
            'title' => ['font-size' => '', 'color' => '#ffffff', 'background-color' => '#32cd32'],
            'description' => ['font-size' => '', 'color' => '#525f7a', 'background-color' => '#d1ecf1'],
            'cta' => ['font-size' => '', 'color' => '#333333', 'background-color' => '#e2e6ea'],
        ],
        'campaigns' => ['checkout_upsells'],
    ];
    return $templates;
});

This PHP snippet will help to add custom template.

After that, you need to create your custom template file in the following path:
/wp-content/themes/<YOUR_THEME_FOLDER>/checkout-upsell-woocommerce/offer/custom-template-1.php

You can refer existing offer template such as offer/template-1 for creating custom template