Discord js Add reaction to a bot message

Question

I've been created my own discord bot but i have this error for this code:

It's send a message to the channel and add reaction, and in my console i have this error:

(node:11728) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): DiscordAPIError: Unknown Message
(node:11728) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:11728) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): DiscordAPIError: Unknown Message

Answer 1

Those aren't error, those are warning. As it is said, you don't check when your promise is rejected. You should use .catch() after .then() in case it get rejected.

https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Promise/catch

Try :

message.channel.send(":apple:***SONDAGE :apple:\n "+choix1+" ou "+""+choix2+"***")
            .then(function (message) {
              message.react("👍")
              message.react("👎")
              message.pin()
              message.delete()
            }).catch(function() {
              //Something
             });