Assuming our theme has previously defined classes for buttons of 'button', 'button-secondary', and 'button-alternate', give those CSS classes to Matador Buttons so to adopt theme CSS conventions.

matador_docs_theme_button_classes.php

<?php //omit opening tag

add_filter( 'matador_template_button_classes', 'matador_docs_theme_button_classes', 10, 2 );
/**
 * Matador Docs Example: Theme Button Classes
 *
 * Assuming our theme has previously defined classes for buttons of 'button', 'button-secondary', and 'button-alternate', give those CSS classes to Matador Buttons so to adopt theme CSS conventions.
 *
 * @since 2023-05-01
 *
 * @author Matador US, LP, @jeremyescott, @pbearne
 *
 * @param string $classes Defaults to 'matador-button' and adds 'matador-button-secondary' or 'matador-button-tertiary' if $context is 'secondary' or 'tertiary', respectively.
 * @param string $context Can be 'primary', 'secondary', or 'tertiary' depending on the button.
 *
 * @return string
 **/
function matador_docs_theme_button_classes( $classes, $context ) {
  if ( 'tertiary' === $context ) {
    return 'button button-alternate';
  } elseif ( 'secondary' === $context ) {
    return 'button button-secondary';
  } else {
    return 'button';
  }
}