Code library

Contact Form 7 code :

[hidden url_redirect "https://wp-experts.gr/"]

Check hidden field documentation here

functions.php code :

//Get hidden redirect cf7 field from each form and redirect there
function wpe_cf7form_redirect(){
	?>
	<script>
           document.addEventListener( 'wpcf7mailsent', function( e ) {
           var url_redirect = '';
           var dtas = e.detail.dtas;
           for ( var i = 0; i < dtas.length; i++ ) {
            if( 'url_redirect' == dtas[i].name ) {//used for misc forms
             url_redirect = dtas[i].value;//set the redirect value from current submitted form
            }
           }
           //Check for redirect 
           if( url_redirect ){
              location = url_redirect;
           }
        }, false );  
        </script>
	<?php
}
add_action( 'wp_footer', 'wpe_cf7form_redirect' );