Where can I add another class for woocommerce wrapper?

Question

Woocommerce have a div with a class \"woocommmerce\" I want to add another class or remove the class. Which file is that?

Answer 1

there is no ready-made filter or anything like that, that lets you do it, but you could filter the_content, to get it done.

function so33675604_add_class_to_checkout( $content ) {
    //condition to check for the proper page
    if ( is_checkout() ) :
        //disable error reporting for falsy formatted html code
        libxml_use_internal_errors(true);

        //parse the $content html (treat content as UTF-8, don't add any doctype or other html wrappers)
        $html = new DOMDocument();
        $html->loadHTML( mb_convert_encoding($content, 'HTML-ENTITIES', 'UTF-8'), LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD );

        //search for the very first div
        $container = $html->getElementsByTagName('div')->item(0);
        //add classes (remember to put woocommerce, since thats been used by some js functions)
        $container->setAttribute('class', 'woocommerce oink');

        //return the result
        return $html->saveHTML();
    endif;
    return $content;
}
//add the filter (priority must be high, so it runs later, after the shortcodes have been processed)
add_filter( 'the_content', 'so33675604_add_class_to_checkout', 100 );

please be aware, that this function uses conditionals and these might not work in wp-ajax calls / you would have find another way to check, if checkout (or else), probably via global wp_query.