Go에서 HTML 템플릿을 점진적으로 작성하는 방법

func renderHTMLTable(w http.ResponseWriter, result *sqlx.Rows) {
    cols, err := result.Columns()
    if err != nil {
        log.Println(err, "renderHTMLTable")
        return
    }
    tmpl, err := template.ParseFiles("./templates/2d.html")
    if err != nil {
        log.Println("template failed", err)
        return
    }
    data := HTMLTable{}
    data.Cols = cols
    for result.Next() {
        cols, err := result.SliceScan()
        if err != nil {
            log.Println(w, err)
            break
        }
        s := make([]string, len(cols))
        for i, v := range cols {
            s[i] = fmt.Sprint(v)
        }
        tmpl.Execute(w, s)
    }
}