WP - manual clean timber excerpt

twig_excerpt.twig

{# beware of gallery shortcodes #}
{% set content = function('strip_shortcodes', item.get_preview(80,false,"",true)) %}
{# strip tags #}
{{ function("strip_tags", post.content)|truncate(50) }}
{{ content|striptags|truncate(50) }}

function custom_trim($value, $limit = 100, $end = '...'){
    $value = strip_tags($value);
    
    if (mb_strwidth($value, 'UTF-8') <= $limit) {
        return array($value, false);
    }

    return array(rtrim(mb_strimwidth($value, 0, $limit, '', 'UTF-8')).$end, true);
}