Question

如何获取当前LIElement的id，它在activeNav（）中触发事件e，因为我想从navMap中找到活动元素。

import 'dart:html';

Map navMap = new Map<String, LIElement>();

void main() {
  navMap["#li-home"] =  query("#li-home");
  navMap["#li-about"] =  query("#li-about");
  navMap["#li-setting"] =  query("#li-setting");
  navMap["#li-home"].onClick.listen(activeNav);
  navMap["#li-about"].onClick.listen(activeNav);
  navMap["#li-setting"].onClick.listen(activeNav);
}

void activeNav(Event e){
  // Get element #li-home from map and add class "active"
  // remove the class "active" from remain LIElements in navMap

Answer 1

您无需在地图中存储所有li元素。只需将事件处理程序附加到包含ul的{{1}}，找出点击的li，然后添加或删除“有效”类：

li

如何从Event e获取元素或元素本身

1 个答案: