test.erl

main(_Arg) ->
    HTML = {p, [{text, "test"}, {class, "bold"}], [
        {span, [{text, "value"}, {class, "bold"}], [
            {span, [{text, "hi"}, {class, "bold"}], []}
        ]}
    ]},

    Texts = get_text(HTML, []),
    
    % ["value","test"]
    ?LOG(Texts). 

get_text({_, _, []}, Result) -> Result;
get_text({_Tag, Attrs, [FirstChild | _]}, Texts) ->
    get_text(FirstChild, [proplists:get_value(text, Attrs) | Texts]).