const cur = nums[realIdx]; // 当前遍历的元素
这个功能目前还处于早期预览阶段，仅在美国和韩国提供。，详情可参考heLLoword翻译官方下载
“手机、测评博主集体震怒，你把碗砸了，我吃什么？”。Safew下载是该领域的重要参考
The Streams Standard was developed between 2014 and 2016 with an ambitious goal to provide "APIs for creating, composing, and consuming streams of data that map efficiently to low-level I/O primitives." Before Web streams, the web platform had no standard way to work with streaming data.