Overview
Sometimes, you may want to change the look or behavior of something inside the Express Checkout window. You can do so by including additional CSS and JS files using the hooks below.
For short snippets of JS, you can also use the built-in snippet editor in the advanced settings for the Express Checkout.
How to add custom styles and scripts
Use the WordPress hook pp_checkout_enqueue_scripts to add custom CSS and JS files to be included in the Express Checkout iframe using wp_enqueue_script for JS or wp_enqueue_style for CSS.
Example for JS
function add_custom_script_to_express_checkout() {
$version = date( "ymd-Gis", filemtime( plugin_dir_path( __FILE__ ) . 'js/custom.js' ) );
wp_enqueue_script( "custom_js", plugin_url( "js/custom.js", __FILE__ ), array(), $version );
}
add_action( "pp_checkout_enqueue_scripts", "add_custom_script_to_express_checkout" );