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# Best Practices
Make your code ๐ฏ - A collection of best practices for software
## ๐ GitHub ๐
* Branch off `master` and complete your feature.
* Pull request `master` and tag relevant people for review.
## โ๏ธ JavaScript โ๏ธ
* 2 spaces (instead of tabs)
* Lint with `eslint:recommended` at a minimum
* Promises (not callbacks)
* No [decorators](https://medium.com/google-developers/exploring-es7-decorators-76ecb65fb841)
* No [mobx](https://mobx.js.org/)
* Test with [jest](https://facebook.github.io/jest/)
* Place jest tests alongside the file(s) it tests (not in a separate directory)
* End test files with `.test.js`
### โ๏ธ React/Redux โ๏ธ
* Lint with [`tslint-react`](https://github.com/palantir/tslint-react) or eslint's [`plugin:react/recommended`](https://github.com/yannickcr/eslint-plugin-react) at a minimum.
* No unnecessary and empty `<div>`โs
* If `this.props.<variable name>` is used more than once, dereference it at the top of `render`.
* Extract variables used in `render()` to the top of `render()`
* API calls should lie in a testable file outside of components.
* Components should not wait for promises to resolve, instead listen on props via reduxโ `mapStateToProps()`.
* Declare and export components in separate places (otherwise the web inspector cannot name components properly)
### Flowtype
* Any types used in more than one file should be placed in `src/types.js`
* Add flow linting via [eslint-plugin-flowtype](https://github.com/gajus/eslint-plugin-flowtype)
* Disallow `any` with [eslint no-weak-types](https://github.com/gajus/eslint-plugin-flowtype#no-weak-types)
* In components which use `mapStateToProps`, separate `OwnProps` from `ConnectedProps` into separate interfaces. Join them with `type Props = OwnProps & ConnectedProps`. In addition, if using `mapDispatchToProps`, create a type `DispatchProps` and join that with `Props`.
### ๐ฃ๐ข TypeScript ๐ฃ๐ข
* Lint with [`tslint:recommended`](https://github.com/palantir/tslint) at a minimum.
* No implicit any (type everything thatโs not inferable)
* Any variable declared without an initial value should be typed
## ๐
CSS ๐
* Prefer Flexbox
* Classes should describe elements and not be generic (`Bigbox` -> `FAQContainer`)
* Mobile: <= 620px
* Tablet: 620px - 1024px
* Desktop: > 1024px
## HTML
* Use `<button>` tags over `<a>` tags for actions.
* Use svg's over all other image formats when possible.
* All `<img>` tags should have `โaltโ` text.
* Only use tables for tabular data (not for layout)
* Make use of html5 elements like `<header>`, `<footer>`, `<nav>`, `<section>`, etc.
## Npm
* Support the following `script`'s in your root `package.json`:
1. `โwatchโ`: Starts the dev server
2. `โbuildโ`: Builds static assets (if they exist)
4. `โtestโ`: Runs all tests (linting first, then unit tests)
## ๐ธ Browsers ๐ธ
* Avoid supporting versions of Internet Explorer before IE11.
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