---
title: Talk slides template
tags: Templates, Talk
description: View the slide with "Slide Mode".
---sdf
sdfsdf
# Unleash the power!f
subgraph core {f
a [label="Text source\nGithub, Gitlab, ..."] [shape=box]
b [label="HackMD Editor"] [shape=box]
sync [label="sync" shape=plaintext ]
b -> sync [dir="both"]
sync -> a [dir="both"]
label="An edit session"
}
}

---

### Architecture of extension

---

![](https://i.imgur.com/ij69tPh.png)

---

## Content script

- Bind with each page
- Manipulate DOM
- Add event listeners
- Isolated JavaScript environment
  - It doesn't break things

---

# :fork_and_knife: 

---

<style>
code.blue {
  color: #337AB7 !important;
}
code.orange {
  color: #F7A004 !important;
}
</style>

- <code class="orange">onMessage('event')</code>: Register event listener
- <code class="blue">sendMessage('event')</code>: Trigger event

---

# :bulb: 

---

- Dead simple API
- Only cares about application logic

---

import * as Channeru from 'channeru'

// setup channel in different page environment, once
const channel = Channeru.create()

---

// in background script
const fakeLogin = async () => true

channel.answer('isLogin', async () => {
return await fakeLogin()
})

<br>

// in inject script
const isLogin = await channel.callBackground('isLogin')
console.log(isLogin) //-> true

---

# :100: :muscle: :tada:

---

### Wrap up

- Cross envornment commnication
- A small library to solve messaging pain
- TypeScript Rocks :tada: 

---

### Thank you! :sheep: 

You can find me on

- GitHub
- Twitter
- or email me