如何使用Dart语言获取所有子元素的数组？

Question

如何以数组的形式获得飞镖类旋转木马的子元素的类名？

<div class="carousel"> 
     <div class="galleryCars"> 
     .... 
     </div> 
     <div class="galleryCars2"> 
     .... 
     </div> 
     <div class="galleryCars3"> 
     .... 
     </div> 
     <div class="galleryCars4"> 
     .... 
     </div> 
</div> 

Answer 1

快速ñ脏：

var carousel = query(".carousel"); 
var classList = []; 
carousel.children.forEach((childElement) => classList.addAll(childElement.classes)); 
print(classList); // [galleryCars,galleryCars2,galleryCars3,galleryCars4] 

Answer 2

这里是如何让孩子的类名的Set：

query('.carousel').children.expand((e) => e.classes).toSet();