JAVASCRIPT

discord js delete message after time

message.reply('Invalid command')
  .then(msg => {
                msg.delete({ timeout: 20000 /*time unitl delete in milliseconds*/});
            })
  .catch(/*Your Error handling if the Message isn't returned, sent, etc.*/);

discord.js messageDelete

client.on('messageDelete', (messageDelete) => {
    //Your code
});

//Note, you have to define client.
//Its best to run these events through something called a "event handler"

discord js delete message after time

message.channel.send("Hello World!").then(msg=>msg.delete({timeout:"2000"/*Time until delete in milliseconds*/})

delete message discord.js

message.delete()

How to delete a message by its id discord.js

// ASSUMPTIONS:
// channel: the channel you want the message to be sent in
// lastmsg: the id of the last poll message

channel.fetchMessage(lastmsg).then(msg => msg.delete());