How to disable autocomplete for inputs in contact form 7? [closed]

Autocomplete tag in form settings does not work anymore (as today Contact Form 7 plugin version 5.1.3.

The only solution which worked for me was to add custom attributes thanks to https://stackoverflow.com/a/46316728/1720476.

E.g. if You have FirstName and LastName fields, where You want to disable autocomplete.

Add this into functions.php file:

add_filter( 'wpcf7_form_elements', 'imp_wpcf7_form_elements' );
function imp_wpcf7_form_elements( $content ) {
    $str_pos = strpos( $content, 'name="FirstName"' );
    if ($str_pos) {
        $content = substr_replace( $content, ' autocomplete="both" autocomplete="off" ', $str_pos, 0 );     
    }

    $str_pos = strpos( $content, 'name="LastName"' );
    if ($str_pos) {
        $content = substr_replace( $content, ' autocomplete="both" autocomplete="off" ', $str_pos, 0 );
    }

    return $content;
}