currentMessage = emoji_replace(currentMessage);

will not work as emoji_replace is my own function for replacing :smiley: with an emoji.
so just get rid of that line and it will work.

And you will also have to instantiate currentMessageId and currentMessageCount globally. I.e.

var currentMessageId = 0
var currentMessageCount = 0

at the top of the js file.

	getDom: function() {
		var messageElement = document.createElement('div');
		if (currentMessageCount < this.slackMessages.length || currentMessageCount == 0){
	currentMessageId = 0;
	currentMessageCount = this.slackMessages.length;
}
var maxAllowed = 5;
var topMessages = this.slackMessages.slice(0, (maxAllowed 0));
var maxCount = Math.min(maxAllowed, topMessages.length);
if (currentMessageId == maxCount 0) { currentMessageId = 0; }
var currentMessage = topMessages[currentMessageId].message;
currentMessage = emoji_replace(currentMessage);
messageElement.innerHTML = currentMessage;
currentMessageId ++;
		}
		return messageElement;
	}
});

if (currentMessageCount < this.slackMessages.length || currentMessageCount == 0){ 
	currentMessageId = 0;
	currentMessageCount = this.slackMessages.length;
}
var maxAllowed = 10;
		
var topMessages = this.slackMessages.slice(0, (maxAllowed - 1));
		
var maxCount = Math.min(maxAllowed, topMessages.length);
		
if (currentMessageId == maxCount - 1) { currentMessageId = 0; }
		
var currentMessage = topMessages[currentMessageId].message;
currentMessage = emoji_replace(currentMessage);
messageElement.innerHTML = currentMessage;
currentMessageId ++;

Just change:

var randomMessageId = Math.floor(Math.random() * this.slackMessages.length);

to the following:

var randomMessageId = 0;

It should work (unrandomizing the order), so long as the slackMessages array is in ascending order. If not, and it’s in descending order, set to this.slackMessages.length - 1 instead of 0.

I want just ‘x’ instead of the ‘randomMessageId’ on the last line and can’t figure out how to do it.