DefinitelyTyped/types/slack-node/slack-node-tests.ts

import Slack = require("slack-node");

let webhookUri = "__uri___";

let slack = new Slack();
slack.setWebhook(webhookUri);

slack.webhook({
  channel: "#general",
  username: "webhookbot",
  text: "This is posted to #general and comes from a bot named webhookbot."
}, function(err, response) {
  console.log(response);
});

// slack emoji
slack.webhook({
  channel: "#general",
  username: "webhookbot",
  icon_emoji: ":ghost:",
  text: "test message, test message"
}, function(err, response) {
  console.log(response);
});

// URL image
slack.webhook({
  channel: "#general",
  username: "webhookbot",
  icon_emoji: "http://icons.iconarchive.com/icons/rokey/popo-emotions/128/after-boom-icon.png",
  text: "test message, test message"
}, function(err, response) {
  console.log(response);
});


let apiToken = "-- api token --";
slack = new Slack(apiToken);

slack.api("users.list", function(err, response) {
  console.log(response);
});

slack.api("chat.postMessage", {
  text: "hello from nodejs",
  channel: "#general"
}, function(err, response){
  console.log(response);
});