Contact form 7 event listeners

Contact form 7 events.js

document.addEventListener( 'wpcf7mailsent', function( event ) {
       location = '<?php echo site_url('/success/')?>';
}, false );

document.addEventListener( 'wpcf7submit', function( event ) {}
/*                       
List of Contact Form 7 Custom DOM Events

    wpcf7invalid — Fires when an Ajax form submission has completed successfully, but mail hasn’t been sent because there are fields with invalid input.
    wpcf7spam — Fires when an Ajax form submission has completed successfully, but mail hasn’t been sent because a possible spam activity has been detected.
    wpcf7mailsent — Fires when an Ajax form submission has completed successfully, and mail has been sent.
    wpcf7mailfailed — Fires when an Ajax form submission has completed successfully, but it has failed in sending mail.
    wpcf7submit — Fires when an Ajax form submission has completed successfully, regardless of other incidents.
*/