Redirect to thank you

thankyou.js

//redirect to thank you page
function mycustom_wp_footer()
{
    echo '<script type="text/javascript">';
    echo 'document.addEventListener( \'wpcf7mailsent\', function( event ) {';
    echo 'window.dataLayer.push({
        "event" : "cf7submission",
        "formId" : event.detail.contactFormId,
        "response" : event.detail.inputs
    });';
    echo 'location = "' . SITEURL . '/thank-you/";';
    echo '}, false );';
    echo '</script>';
}

add_action( 'wp_footer', 'mycustom_wp_footer' );