Get channels of category discord v14

i’m trying to get all channels and delete these channels of category in discord v14, but throw me an error:

client.channels.cache.get(…).children.forEach is not a function

client.channels.cache.get("1234567890123456")
    .children.forEach(channel => {
       channel.delete();
     })

// client.channels.cache.get("1234567890123456")  Works but didn't give me the channels.

Answer

CategoryChannel.children is type CategoryChannelChildManager, which doesn’t have a forEach method, so you can’t call forEach on it. CategoryChannelChildManager.cache is type Collection<Snowflake, GuildChannel>, which does has a forEach method, so you can call forEach on it.

client.channels.cache.get("1234567890123456")
    .children.cache.forEach([channelId, channel]=> {
       channel.delete();
     })