This one has been quite a while in the making but im proud to announce this innovative new game we have been working on.



# TLDR;

<iframe width="853" height="480" src="https://www.youtube.com/embed/AEC2tPX6HdM" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

# History

I have been building chrome extensions for [quite some time](/posts/my-first-chrome-extension-post-to-tumblr/) and have always considered them a powerful and often overlooked medium.

When I came across the [Tabby Cat](https://chrome.google.com/webstore/detail/tabby-cat/mefhakmgclhhfbdadeojlkbllmecialg) extension a few years back I realized that the New Tab page is a powerful space for content that gets short but frequent attention (every new tab thats opened). It got my brain-juices flowing and I began to wonder what else we could use the new-tab page for.

Obviously as a game developer my mind quickly turned to what games could be played there. It needed to be asynchronous and quick to take your turn so you can continue on with what you were doing. I thought about classic board games and the first one I thought about was Battleships.

I half-started to implement what would become "BattleTabs" some years ago but never completed it.

When I mentioned the idea to my partner-in-crime Brandon he agreed that its an interesting idea and so we started to explore the idea a little more.

We decided to enlist the skills of my ex-colleague and artist extraordinaire [Alan Macfarlane](http://www.melbournemonsters.com/alan-macfarlane). A month or so of development later and BattleTabs was born!

# How It Works

So what is BattleTabs? Well its "An Asyncronous New Tab Chrome Extension Game", a descriptive but mouthful of a name. I like to think of it as a "Nano Game". That is you can dip into the game for a second (or less) at a time.

You start the game by going to the Chrome Webstore and installing an extension: https://chrome.google.com/webstore/detail/battle-tabs/mjcklhnhfiepmofggcoegkmkokbljmjd

Once installed the extension will replace your current new-tab page. The first time you open it you will immediately be asked to start placing your ships for your first match:

![](./first-match.png)

You can drag and rotate the ships to whatever you think are good positions or you can randomize the positions for quick action.

Once ready you give yourself a name and avatar (clicking the avatar changes it):

![](./create-user.png)

And then you are straight into the action:

![](./waiting-for-opponent.png)

If theres another player that is waiting for an opponent too you will instantly be matched up against them.

You can then start taking turns trying to sink each others ships.

![](./taking-turns.png)

Because the game is designed for quick bursts of gameplay you can close the window at any time and the game will continue to periodically check in the background for turns from your opponent. It will let you know via a notification if they took a turn.

You can start a new match at any time, but you can only have 5 active matches at any one time.

![](./new-match.png)

You have one day to take your turn otherwise you forfeit your turn. If you forfeit your turn three times in a row you automatically loose the match.

Scoring is pretty simple for now with a point ranking based on the number of games you have won or lost, but we plan on improving that later (see Future Plans).

![](./simple-scoring.png)

# Development

Development was quite an involved process as it often is with games. We first had to decide how we wanted to present the game, should it be 3D, topdown, isometric or something more exotic?

![](./playing areas.png)

We ended up with a simple isometric layout. We felt like it gave us the right combination of aesthetic and simplicity on art requirements as you can simply horizontal flip the sprite to make it look like its going in a different direction.

Once we had the general layout down we moved on to how do we present the ships. The talented Alan knocked out a bunch of different options for us to choose from:

![](./theme1.png)

![](./theme2.png)

![](./theme3.png)

![](./theme4.png)

![](./theme5.png)

We decided that the Vikings theme would be best for the first release but we liked the idea some of the others so much we thought about future upgrades where the player can choose from different "themes" they can play with.

I got to work developing the actual game in isometric. I had built a few isometric games before and one effect I like from block based isometric is seeing the blocks move independently, it gives a sort of rippley water effect so I had a go at implementing that.

<iframe width="853" height="480" src="https://www.youtube.com/embed/AaU5sJXYWhs" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

I was originally using React to do all of this but I discovered that react is a little too slow to animate this many objects so I reluctantly changed over to using Phaser3 for the game engine. I really didnt enjoy using Phaser tho, I think I would probably just roll my own solution in the future for more control.

Talking about isometric we had some issues with the length of the ships and isometric depth sorting.

<iframe width="853" height="480" src="https://www.youtube.com/embed/ivIm2bZNQ3Q" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

The issue is that isometric doesnt work too well when you have long sprites. After much discussion and experimentation (and fighting with Phaser) we decided on a solution that split the sprites up so they could be depth sorted individually

![](./depth-sorting-masks.png)

This finally solved the issue.

One other thing we fiddled around with for a while was how to indicate the various states that cells could be in.

![](./blocks.png)

For example when you click a cell to make a guess, it first enters the "guessing" state to indicate that its waiting for a response from the server. It then transitions to either a "hit" or "miss" state depending on if there is a ship there or not. Then finally there is a the "destroyed" state to make it clear that you have destroyed a ship at that cell so you dont need to explore any more.

# Future Plans

So its obviously very early days for the project and to be honest we are really just testing the idea out at this stage. Is the new-tab page a good medium for games? We arent sure. We think it is but time will tell.

If people are interested in the game then we have a bunch of future plans for things we want to work on to improve the game.

![](./trello.png)

Our public [Trello Board](https://trello.com/b/EoQS8Hq2/battle-tabs) lists a bunch of the things we have planned. This lets people see what we want to work on next and they can vote on their favorite's or add a comment to suggest something thats not on the list.

One of our favorite upcoming features is per-match-chat. You can use it to send quick messages to your opponent. We are considering making it emoji only chat which would be rather novel. If they are only emoji-based then theres no real way to send abuse thus we dont have to spend time moderating it.

Currently the game is totally free but obviously we will need a way to pay for continued development so we are thinking that we could sell new "themes", "skins" and other content to enhance the game.

Anyways let us know what you think of the game, is it interesting? What do you think we could do to improve it?

Its been a little while since I have done a pure tech focused blog post but I discovered an issue with React Hooks and Chrome Extensions for which I could find no mention of anywhere on the internet so I thought I would share the issue and my solution.



# The Issue

So the problem is; if you build a chrome extension with a background page and try to use a `useEffect` hook on that page, you will notice that the handler of the effect doesn't trigger.

```typescript
import * as React from "react"
import { render } from "react-dom"
import { useEffect } from "react"

function App() {
  console.log("Execution reaches here..")

  useEffect(() => {
    console.log("..but this never gets triggered.")
  }, [])

  return <div />
}

render(<App />, document.getElementById("root"))
```

This is obviously not quite right.

I put together a demo app for this here: https://github.com/mikecann/bgpage-hooks-issue

# The Workaround

It appears as if this issue started happening somewhere between 16.8 and 16.9 so you could just downgrade your react version.

I also discovered that you can workaround the issue with this little hack:

```typescript
function useBackgroundKeepaliveHack() {
  const [tick, setTick] = useState(0)
  useLayoutEffect(() => {
    setTick(1)
    setInterval(() => setTick(prev => prev + 1), 1000)
  }, [])
}
```

If you add that into your component tree then hte effect now triggers as expected, very curious. Perhaps it has something to do with the fact that background pages aren't actually rendered to the screen thus perhaps React can detect that and prevent effect updates?

I have reported the issue to the React github page so hopefully it will be looked into and fixed at some point: https://github.com/facebook/react/issues/16629

I last wrote about Markd [back in September of last year](/posts/portfolio/projects/introducing-markd-pinterest-for-people/) so I think its about time I gave you an update on our latest progress on the project.



# Refresh

Just a quick reminder about Markd; its a super cool project that I worked on for my long-term client and friend [Brandon Wu](https://www.pepwuper.com/).

At its core, its a chrome-extension that lets you "bookmark people". So for example, say you stumble across a cool games developer on Twitter and you want to make a note of him for a project you have planned in the future. You can simply click the Markd icon in Chrome to "mark" them. They are then added to your searchable collection for the future.

## TLDR;

Check out the video below for a quick demonstration:

<iframe width="853" height="480" src="https://www.youtube.com/embed/0TH_JNTOPdg" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

# The Problem

As [mentioned previously](/posts/portfolio/projects/introducing-markd-pinterest-for-people/) the tech stack in Markd 1 was a combination of Aurelia for the extension with Microsoft's ASP.net Core on the backend and hosted on Azure.

The problem was that I was never very happy with the way things were on the code level. There was no sharing between the extension and the client which led to many issues and bugs in conversion from one data format to another. I also had problems building Aurelia as every time I went back to it, everything had changed and I could no longer build. None of the docs matched what I had and it was generally a nightmare.

# The Update

I decided I need a do-over, this time I decided that I wanted the entire thing in the same language so I could share the code between the client, server and extension.

## Typescript

This time I wrote the entire thing using my favourite Javascript alternative: Typescript. I have been a fan of Typescript for many years now and have blogged about it many times so I wont wax on about it much here.

Just a quickly; one of the new Typescript features I took advantage of for Markd2 was "[non-nullable types](https://blog.mariusschulz.com/2016/09/27/typescript-2-0-non-nullable-types)". To be honest this feature is so great it should be in _every_ language, I strongly recommend reading up on it as it totally destroys an entire class of bugs.

## React

I have been using React for years now, and IMO its pretty much how the UI should be done. I wont talk about it here because well.. if you dont know about React yet then you are [doin' it wrong](http://thechive.com/category/humor/doin-it-wrong-funny/).

## MobX State Tree

For state management I started off by using my favourite, [MobX](https://mobx.js.org/) but discovered there was an update on their sister project [MobX State Tree](https://github.com/mobxjs/mobx-state-tree) (MST) that I had been following for a while so decided to give it a whirl and fell in love.

MST is a state management library similar to [Redux](http://redux.js.org) except unlike Redux the properties in your model are reactive. That is you can listen to them and create "computed" variables that react when that property changes.

So for example here is part of the model for a Mark:

```typescript
export const Mark = types
  .model({
    id: "",
    name: "",
    profileImage: types.maybe(MarkdFile),
    importedId: types.maybe(types.number),
    tags: types.optional(types.array(types.string), []),
    links: types.optional(types.array(types.string), []),
    referenceImages: types.optional(types.array(MarkdFile), []),
    description: "",
    notes: "",
    sourceUrl: "",
    createdByUserId: "",
    createdAt: types.maybe(types.Date),
    updatedAt: types.maybe(types.Date),
  })
  .named("Mark")
  .views((self) => ({
    get hasBeenSavedToServer() {
      return self.createdAt != null;
    },
  }))
  .actions((self) => ({
    setName(v: string) {
      self.name = v;
    },
    setProfileImage(v: IMarkdFileSnapshot | null) {
      self.profileImage = v as any;
    },
    setTags(v: string[]) {
      self.tags = v as any;
    },
    setLinks(v: string[]) {
      self.links = v as any;
    },
    setReferenceImages(v: IMarkdFileSnapshot[]) {
      self.referenceImages = v as any;
    },
    setDescription(v: string) {
      self.description = v;
    },
    setNotes(v: string) {
      self.notes = v;
    },
    setSourceUrl(v: string) {
      self.sourceUrl = v;
    },
    setCreatedByUserId(v: string) {
      self.createdByUserId = v;
    },

    load: process(function* load(id: string): any {
      const service = getEnv<IMarkEnv>(self).marksService;
      self.id = id;
      var snapshot = yield service.getMark(id);
      applySnapshot(self, snapshot);
    }),
  }));
```

As you can see we can define a number of properties in a strongly typed manner in the "model", then we can declare computed properties such as `hasBeenSavedToServer` in the "views" then we can define actions that can mutate the model in "actions". Those types are checked at compile time (thanks to Typescript) and runtime (during development) so you can catch even more of those pesky Javavascript typing issues.

Its a nice little system that combines the best of MobX and Redux.

I used MST to great effect in both the client and extension. I was able to reuse a lot of code between the two which made for less bugs.

## Parse Server

For the backend I decided to go with [Parse Server](https://github.com/parse-community/parse-server). Why go with a defunct project I hear you cry? Well since Facebook decided to shut down Parse back in Feb of this year Parse has actually continued to grow in its Open-Source form and is constantly being added to.

I know Parse very well having used it before on many projects. With Parse you get a lot of things right out of the box such as Authentication, Data Storage, REST Endpoints, Live Object Updates and many others. All stuff I would have had to build up myself (and likely gotten wrong).

One of the other benefits of using Parse is you get a pre-built dashboard on your database which I find incredibly helpful:

![](./dashboard-ss.png)

Sure, you could say that editing databases manually is a bad idea but during development it can be quite the godsend.

## Unit Testing with Jest

Im sorry to say that after all my various web based projects over the years this is the first one in which I have employed Unit Testing properly. Previously I have had bad experiences with Unit Testing in Javascript but im very glad to say things seem to have come a long way.

```typescript
test("when loading, snapshot is applied", async () => {
  const markServiceMock = mock(MarksService);
  const marksService = instance(markServiceMock);

  when(markServiceMock.getMark("mid")).thenReturn(
    Promise.resolve({
      id: "mid",
      name: "mike",
      referenceImages: [{ name: "xxx", url: "yyy" }],
    })
  );

  var mark = Mark.create({}, { marksService });

  await mark.load("mid");

  expect(mark.id).toBe("mid");
  expect(mark.name).toBe("mike");
  expect(mark.referenceImages.length).toBe(1);
  expect(mark.referenceImages[0].name).toBe("xxx");
  expect(mark.referenceImages[0].url).toBe("yyy");
});
```

Writing tests is _almost_ as nice as C#. The above example is one test for the Mark model I used above. We are able to mock the return of the service, await the return of an async operation and assert the result, pretty sweet!

# Build Tools

## Yarn Workspaces

Sadly one of the big time-sinks of any Javascript project these days is how you go about building the damn thing. Its so bad that it even has a name [javascript](https://hackernoon.com/how-it-feels-to-learn-javascript-in-2016-d3a717dd577f) / [tool fatigue](https://medium.com/@mrannedev/it-s-not-javascript-tool-fatigue-it-s-javascript-bullsh-t-fatigue-5f90f81423fb).

Unfortunately I suffered from this yet again, spending weeks just trying to get the various projects to compile and work together. One key problem is what happens when your main "solution" has multiple sub-projects in it. Visual Studio solved this years ago with .csproj and .sln files but Javascript still struggles with this.

One solution that has evolved over the yeas is [lerna](https://lernajs.io/). Lerna attempts to manage the dependencies between packages automatically. The idea is that you structure your projects inside the solution directory such as:

![](./lerna-structure.png)

Lerna then manages the dependencies between the packages by using symlinks (`npm link`). This makes me shudder every time. I cant believe this is 2017 and we are using symlinks for dependency management 😢

I had issues when using Lerna. Libraries were getting included twice in my build and other various issues. In the end I ended up using the very new [yarn workspaces](https://yarnpkg.com/blog/2017/08/02/introducing-workspaces/). Yarn workspaces attempts to formalize the concepts in Lerna by baking them into the dependency management tool itself.

Im not sure exactly how or why this worked for me, but it did so im not going to argue with it and spend any more time on it (can you tell im frustrated with this crap?).

## Node Package Scripts (NPS)

Ive got a fair bit to say about this so have moved it out into [its own blog post](/tooling/node-package-scripts/).

## React Scripts

For the "client" (the SPA website https://markd.co) I decided to go with the incredibly popular [create-react-app](https://github.com/facebookincubator/create-react-app) this took away much of the build for dev / build for productuon production headaches that I usually faced with JS build tools.

Because I use typescript I had to use a slight variant on the project, if you want to do the same I reccomend starting with this: https://github.com/Microsoft/TypeScript-React-Starter

# Infrastructure

For this rewrite I decided to go with static hosting using a combination of Route53, Cloudfront and S3 to host the static part of the website (client) then used Heroku backed by mLab for the server and API. That's a fair few moving pieces but in the end it gives us total flexibility with minimal cost.

Because the static part of site is on S3 and Cloudfront CDN its really quick.

# Conclusion

Im really happy with the result of Markd2 the site is considerably faster, thanks to being hosted on Cloudfront and Heroku. Its less bug-prone because there is lots of shared code, plus im using the latest and greatest Typescript features. Its more reliable because its got a bunch of unit tests to ensure changes dont break anything. Its more flexible because we control the entire stack.

It took me quite a bit longer than I had hoped to get to this stage but now its finally there, it should be a solid foundation moving forward.

[Markd](https://markd.co/) is a project I have been working on for Brandon over a [pepwuper.com](https://www.pepwuper.com/) for a while now.



Quite simply its a Chrome Extension and website that allows a user to quickly and easily bookmark people you come across on the internet. In [Brandons own words](https://www.pepwuper.com/markd-pinterest-for-people/):

> I wanted a better way to go about the process. A simple tool that would allow me to save someone into my “book of interesting people”, no matter which site I find them on. I wanted it to be easy with image/description automatically filled out. I wanted it to allow me to save reference images. And I wanted it to have a simple way for me to organise and search those I’ve bookmarked later on.
> And so he contacted me to help him build out such a tool and [Markd](https://markd.co) was born:

![chrome_2016-09-15_08-36-51](https://www.mikecann.blog/wp-content/uploads/2016/09/chrome_2016-09-15_08-36-51.png)

## The Extension

The tool comes in two parts. Firstly there is a [Chrome Extension](https://chrome.google.com/webstore/detail/markd/beaalofkiocejchbpaocbbjhobmambpp):

![chrome_2016-09-15_09-03-37](https://www.mikecann.blog/wp-content/uploads/2016/09/chrome_2016-09-15_09-03-37.png)

Once installed (and logged in) you can visit any site then just hit the little Markd icon on the browser toolbar:

![chrome_2016-09-15_09-05-27](https://www.mikecann.blog/wp-content/uploads/2016/09/chrome_2016-09-15_09-05-27.png)

This opens a window which auto populates from the page you are on:

![chrome_2016-09-15_09-08-47](https://www.mikecann.blog/wp-content/uploads/2016/09/chrome_2016-09-15_09-08-47.png)

Currently the auto-population only works for a number of the most popular sites sites, namely: "Twitter, Linkedin, Behance, Facebook, Dribble, DeviantArt, Github and ProductHunt", but if it isnt on that list (or even if it is) you can easily edit any part of the Mark before it is saved. Images are scraped from the page and presented in a handy dialog:

![2016-09-15_09-33-32](https://www.mikecann.blog/wp-content/uploads/2016/09/2016-09-15_09-33-32.gif)

## The Website

Once saved you can view and edit your saved marks on Markd.co:

![chrome_2016-09-15_09-37-52](https://www.mikecann.blog/wp-content/uploads/2016/09/chrome_2016-09-15_09-37-52.png)

## The Tech

The two parts (Chrome Extension and website) were built with two different technologies.

### Chrome Extension

I decided to go with [Aurelia](https://aurelia.io/) for the extension. I was wanting to find an excuse to give it a try for a while and this seemed like the perfect opportunity.

Its a framework for web app development from Rob Eisenberg, the same dude that worked on Durandal and Angular before deciding he wanted to go his own direction and create Aurelia.

Much like Angular its a template-based framework like Angular e.g.

[code lang="html"]
<template>

<h1>\${heading}</h1>

<form submit.trigger="addTodo()">
<input type="text" value.bind="todoDescription">
<button type="submit">Add Todo</button>
</form>
</template>
[/code]

You then write a backing "Component" class which implements the "addTodo()" function and provides the "heading" variable etc.

In addition to this it provides many other nice things out of the box such as easy to setup routing and good support for Typescript.

Because it is quite new I did have quite a few setup difficulties, in the end I managed to get it all working and found it a pleasure to use.

### The Website

I wasn't sure which backend tech to use for this, there were many options. In the end I decided to go with .Net (C#) hosted on Azure. Development was "relatively" simple because of the excellent VisualStudio tooling with C#. I did however have some difficulties around providing my own Authentication scheme using Json Web Tokens. In the end I managed to get it working thanks to a number of helpful projects on github.

Azure itself also provided its own share of problems; one such such being it seems to be impossible to handover a resource group to another user. To me this is a pretty common usecase for a freelancer that wants to handover a completed project to a client.

We also ran into the auto-DB backups not actually running for some reason. For all its power, Azure can be a bit of a fickle beast sometimes, in the future I will probably stay away from it.

## Conclusion

[Markd](https://markd.co/) was a great project to work on and im proud of the result and the [client is happy](https://www.pepwuper.com/markd-pinterest-for-people/) which makes me happy. We have a bunch of other features and things we want to add to it but that will have to wait for another blog post, for now tho you can check out the tool for free at:

[https://markd.co/](https://markd.co/)

Let me know what you think in the comments below!

Following on my theme of "Not Games" projects, I have just released my latest Chrome Extension; [Trello Chat](https://chrome.google.com/webstore/detail/trello-chat/ohgelebenfafafahlppompddhdkimcan).



![Screenshot01-640x480](https://www.mikecann.blog/wp-content/uploads/2015/12/Screenshot01-640x480.png)

Like my last project, [Trello Tasks](https://www.mikecann.blog/myprojects/trello-tasks/trello-tasks-a-new-chrome-extension/), this is an extension for Trello. I love Trello and use it to organise just about everything. Our team used it at the [Startup Weekend last month](https://www.mikecann.blog/myprojects/tuckr/startup-weekend-perth-2015-tuckr/) to organise our project over the weeked, I also noticed quite a few other teams using Trello too.

One issue we faced however was although we were sat next to each other we needed to be able to quickly swap a link or some copy as we worked on the project. The problem is we didn't have any chat system setup like Skype or Slack. This got me thinking, if only we could chat through Trello, we already have everyone signed up to the board, it would make things so much easier.

And thus Trello Chat was born.

<iframe width="640" height="480" src="https://www.youtube.com/embed/M-5o2eZrCl0" frameborder="0" allowfullscreen></iframe>

I borrowed some stuff from my work on Trello Tasks so that reporting problems is really easy:

![Screenshot04-640x400](https://www.mikecann.blog/wp-content/uploads/2015/12/Screenshot04-640x400.png)

It supports full Markdown syntax:

![Screenshot02-640x400](https://www.mikecann.blog/wp-content/uploads/2015/12/Screenshot02-640x400.png)

You can also disable and enable chat per board:

![Screenshot03-640x400](https://www.mikecann.blog/wp-content/uploads/2015/12/Screenshot03-640x400.png)

I am, of-course, tracking all of my development on Trello on this public board: [https://trello.com/b/Mdpd40Tt/trello-chat](https://trello.com/b/Mdpd40Tt/trello-chat) you can vote on various features for me to implement there or send me an email: mike.cann@gmail.com or tweet: [@mikeysee](https://twitter.com/mikeysee).

The extension is available to download for free here: [https://chrome.google.com/webstore/detail/trello-chat/ohgelebenfafafahlppompddhdkimcan](https://chrome.google.com/webstore/detail/trello-chat/ohgelebenfafafahlppompddhdkimcan)

If it's popular I have plans for lots of other features :)

So I am taking a little time away from games development at the moment to explore a few other projects and ideas. I want to solve real problems that either I or others have had. I want the projects to be short so I don't get bored and frustrated and I want to also learn new techniques and technologies as I build them.



The first of these little projects is called [Trello Tasks](https://chrome.google.com/webstore/detail/trello-tasks/icedfgfhjcnidibolnnfbjnjbkbfgcic).

![screenshot-01-640x400](https://www.mikecann.blog/wp-content/uploads/2015/11/screenshot-01-640x400.png)

The TL;DR of Trello Tasks is: it augments Trello by turning Cards into "completable" tasks.

I have [spoken about Trello before](https://www.mikecann.blog/misc/indie-game-project-management-with-trello/) but if you arent familiar with Trello its a super simple, popular and free [Kanban](https://en.wikipedia.org/wiki/Kanban) style app designed to organise any data. You can create any number of "Lists" which you then populate with "Cards". You can add images, links, comments etc to cards which allows you to organise just about any sort of project.

![](https://www.mikecann.blog/wp-content/uploads/2014/09/drag-drop-trello.gif)

One of the most common ways to use Trello is in the "ToDo" style. In this style you have three lists, ToDo, Doing and Done:

![2015-11-25_08-28-57](https://www.mikecann.blog/wp-content/uploads/2015/11/2015-11-25_08-28-57.png)

In this style, when you start work on something, you move it from the "ToDo" List to "Doing" List then when its complete you move it to "Done" List.

This is all well and good but what if you use a different system of organisation such as arranging the items by category:

![2015-11-25_08-31-45](https://www.mikecann.blog/wp-content/uploads/2015/11/2015-11-25_08-31-45.png)

Now if you want to indicate that you have read a book or watched a movie you would have to either drag it into the "Done" list (and loose the categorisation) or create a "Done" list for each category. One other option is to "Archive" the card but doing this removes it from the list altogether.

![2015-11-25_08-36-50](https://www.mikecann.blog/wp-content/uploads/2015/11/2015-11-25_08-36-50.gif)

So I decided to try and solve this very particular but annoying problem. My solution is to add a checkbox to each card. Now cards can be marked "complete" and "uncomplete" by simply checking the checkbox.

![2015-11-25_08-41-18](https://www.mikecann.blog/wp-content/uploads/2015/11/2015-11-25_08-41-18.png)

The extension works by piggybacking on Trello's comments system. So each time you complete or uncomplete a task the extension adds a comment to the card.

![2015-11-25_08-43-25](https://www.mikecann.blog/wp-content/uploads/2015/11/2015-11-25_08-43-25.png)

This means that in a multi-user board you can tell who completed or uncompleted a task and syncing "just works":

![2015-11-25_08-47-32](https://www.mikecann.blog/wp-content/uploads/2015/11/2015-11-25_08-47-32.gif)

So I think its a pretty neat solution to a problem that I personally have had while using Trello. You can grab the extension now and for free from the Chrome store:

[https://chrome.google.com/webstore/detail/trello-tasks/icedfgfhjcnidibolnnfbjnjbkbfgcic](https://chrome.google.com/webstore/detail/trello-tasks/icedfgfhjcnidibolnnfbjnjbkbfgcic)

I have a few more ideas like this I would love to explore and solve over the coming weeks so stay tuned!