Javascript 筛选列表会崩溃而不会引发错误

我有这段谷歌应用脚本代码，用于获取一些YT频道，并过滤其中一些频道：

    var popularChannels = YouTube.Channels.list('id, snippet, statistics', {
        id: resultsParentChannelIds.slice(i * 50, (i + 1) * 50)
    }).getItems().
    filter(
      ch => 
    ((channelIdFilter == "" || ch.id == channelIdFilter)
    && (subCountFilter == "" || ch.statistics.subscriberCount > subCountFilter)
    && (channelLocationFilter == "" || channel.snippet.country == undefined || channel.snippet.country == channelLocationFilter)
    && (channelNegativeLocationFilter == "" || channel.snippet.country == undefined || channel.snippet.country != channelNegativeLocationFilter)));

除最后一个负位置过滤器外，所有过滤器都是

”

但是调试器在第一个过滤器之后停止，并且没有写入任何错误

我如何调试或了解问题所在

---

您将currentValue变量从

ch

更改为

channel

var popularChannels = YouTube.Channels.list('id, snippet, statistics', {
  id: resultsParentChannelIds.slice(i * 50, (i + 1) * 50)
}).getItems().
filter(
ch => 
((channelIdFilter == "" || ch.id == channelIdFilter)
&& (subCountFilter == "" || ch.statistics.subscriberCount > subCountFilter)
&& (channelLocationFilter == "" || ch.snippet.country == undefined || ch.snippet.country == channelLocationFilter)
&& (channelNegativeLocationFilter == "" || ch.snippet.country == undefined || ch.snippet.country != channelNegativeLocationFilter)));