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---
title: Core Client Architecture
keywords: homepage
sidebar: talk_sidebar
permalink: client-architecture.html
summary:
---
## The Stack
- [React](#react)
- [Redux](#redux)
- [ImmutableJS](#immutablejs)
## The Architecture
Our frontend lives within [talk/client](https://github.com/coralproject/talk/tree/153193959cb4dfa5d8feaabb49811325f836ee68/client) folder. Every folder contains a plugin. In [coral-framework](https://github.com/coralproject/talk/tree/153193959cb4dfa5d8feaabb49811325f836ee68/client/coral-framework) you will find the core architecture of Talk.
Here is where our Redux Application, translations, components, and helpers live.
## Presentational and Container Components
We use a common simple pattern called
__Presentational and Container Components__
It basically consist in having two types of components:
- Presentational
- Containers
### Presentational Components
- __How our UI looks like__
- Are stateless components
- Render props
- Allow containment of children via `this.props.children`
- They have DOM Markup
### Container Components
* __How things work__
* They dont have markup nor styles
* They provide data and behaviour to Presentational or Container Components
* They connect via `react-redux`s `connect()` to the state.
* They `mapStateToProps` the state to the Presentational Container.
* They `mapDispatchToProps` to send actions to the Presentational Container.
* Name Convention `<Name>Container.js`
How a container looks like:
```js
/*
* mapStateToProps
* We map the part of the state that we want to use
*/
const mapStateToProps = state => ({
auth: state.auth.toJS()
});
/*
* mapDispatchToProps
* We map the actions that we want to use
*/
const mapDispatchToProps = dispatch => ({
checkLogin: () => dispatch(checkLogin())
});
/*
* connect
* We wrap our container in a connect() function
*/
export default connect(
mapStateToProps,
mapDispatchToProps
)(SignInContainer);
````
How our SignInContainer works: [talk/SignInContainer.js · GitHub](https://github.com/coralproject/talk/blob/153193959cb4dfa5d8feaabb49811325f836ee68/client/coral-sign-in/containers/SignInContainer.js)
Within our plugins we create two folders `containers` and `components` so we can differentiate them:
```
coral-sign-in/
├── containers/
│ └── SignInContainer.js
└── components/
├── SignInContent.js
└── SignUpContent.js
```
More about this architecture:
[Container Components Learn React with chantastic Medium](https://medium.com/@learnreact/container-components-c0e67432e005#.w8mzgndcg)
[Presentational and Container Components Dan Abramov Medium](https://medium.com/@dan_abramov/smart-and-dumb-components-7ca2f9a7c7d0#.ai4ih55v3)
## GraphQL
We use [Apollo](http://www.apollodata.com/) to handle graph requests and handle state.
## Redux
We use [Redux](http://redux.js.org/) to handle the auth state.
## ImmutableJS
We use Immutable JS to maintain our state immutable.
We found some really good tradeoffs while building Talk.
[How to use ImmutableJS and how we use it with Talk](https://facebook.github.io/immutable-js/docs/#/)
## Test
[How we do testing at Coral with Talk](/tools.html)
## Lint
For linting in Talk we use `eslint:recommended`
You can find more info about the rules and best practices here:
http://eslint.org/docs/rules/#best-practices
## Lint the code
```js
yarn lint
```
## The Future of the Frontend
- Preact
- Reselect