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+---
+layout: post
+title: "Javascript live chat tutorial: Free alternative to Firebase"
+date: 2020-02-10 13:37:00 +0000
+tags: tutorial decentralization chat iris
+---
+Need a chat box for your website? Want something more independent and affordable than Firebase? In this super simple tutorial, I'll show you how to build a chat using [iris](https://github.com/irislib/iris-lib).
+
+The chat is offline-first and end-to-end encrypted. It is stored and propagated using the distributed database [gun](https://github.com/amark/gun).
+
+No signup of any kind required: just generate a key pair for the chat recipient. Optionally spin up your own free heroku instance to relay messages. **Cost $0**.
+
+# 1. Include iris, gun and sea
+
+Sea is gun's cryptography library.
+
+```
+
+
+
+```
+
+# 2. Initialize gun
+
+```
+var gun = new Gun({peers: ['https://gun-eu.herokuapp.com/gun']})
+```
+
+You can connect to someone else's gun node, or you can easily spin up one using Heroku or Docker.
+
+# 3. Create a key for the user (chat initiator)
+
+Generate a new key:
+
+```
+var key = await iris.Key.generate()
+```
+
+Or generate a key and store it in localStorage:
+
+```
+var key = await iris.Key.getDefault()
+```
+
+# 4. Get the chat recipient's chat link
+
+1. Go to [iris.to](https://iris.to) ([Github mirror](https://irislib.github.io/iris-messenger/src/)).
+2. Click "Copy your chat link"
+3. Paste:
+
+```
+var chatLink = [chat link here]
+```
+
+# 5. Create chat
+```
+var chat = new iris.Chat({gun, key, chatLink})
+```
+
+# 6. Add chat box to document
+
+Iris library comes with an embeddable chat box.
+
+```
+var box = chat.getChatBox()
+document.body.appendChild(box)
+```
+
+It's as simple as that! Chats opened by users will now show up for the key / account you created at iris.to.
+
+Feel free to inspect the element and override the stylesheet to match your site's look and feel.
+
+# Full example
+
+```
+
+
+ Live Chat Example
+
+
+
+
+
+
+
+
+
+```
+
+[Codepen](https://codepen.io/mmalmi/pen/bGddeqE), [Github](https://irislib.github.io/iris-lib/example/chatbox/)
+
+# Technical notes
+
+Chats are persisted in users' browsers. Heroku nodes are ephemeral: their filesystem is reset once in a while. If you want to persist the chats on a server, you can add S3 storage to your heroku gun instance, or run a docker gun node.