如何获取元素的所有类名称？

Question

当用户单击时如何获取元素的所有类别？

我尝试过：

#standardSQL
SELECT *, IFNULL(FIRST_VALUE(count) OVER (win), 0) prev_count
FROM `project.dataset.events`
WINDOW win AS (PARTITION BY type ORDER BY UNIX_DATE(day) RANGE BETWEEN 2 PRECEDING AND 2 PRECEDING)   

Answer 1

尝试

@HostListener('click',['$event']) click(event){
    console.log(event.target.className);
  }