eslint-plugin-compat
=====================
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Lint the browser compatibility of your code
## Setup
### 1. Install
```bash
npm install --save-dev eslint-plugin-compat
```
### 2. Update ESLint Config
```jsonc
// .eslintrc.json
{
"extends": ["plugin:compat/recommended"],
"env": {
"browser": true
},
// ...
}
```
### 3. Configure Target Browsers
Browser targets are configured using [browserslist](https://github.com/browserslist/browserslist). You can configure browser targets in your `package.json`:
#### `package.json`
```jsonc
{
// ...
"browserslist": ["chrome 70", "last 1 versions", "not ie <= 8"]
}
```
If no configuration is found, browserslist [defaults to](https://github.com/browserslist/browserslist#queries) `"> 0.5%, last 2 versions, Firefox ESR, not dead"`.
See [browserslist/browserslist](https://github.com/browserslist/browserslist) for more details.
## Adding Polyfills
#### v3
Add polyfills to the settings section of your eslint config. Append the name of the object and the property if one exists. Here are some examples:
```jsonc
{
// ...
"settings": {
"polyfills": [
// Example of marking entire API and all methods and properties as polyfilled
"Promise",
// Example of marking specific method of an API as polyfilled
"WebAssembly.compile",
// Example of API with no property (i.e. a function)
"fetch",
// Example of instance method, must add `.prototype.`
"Array.prototype.push"
]
}
}
```
#### v2
[See wiki polyfills section](https://github.com/amilajack/eslint-plugin-compat/wiki/Adding-polyfills)
## Demo
For a minimal demo, see [amilajack/eslint-plugin-compat-demo](https://github.com/amilajack/eslint-plugin-compat-demo)
## Advanced
* [Allowing Custom Records](https://github.com/amilajack/eslint-plugin-compat/wiki/Custom-Compatibility-Records)
## Road Map
See the [Road Map](https://github.com/amilajack/eslint-plugin-compat/wiki) for the details.
## Inspiration
Toolchains for native platforms, like iOS and Android, have had API linting from the start. It's about time that the web had similar tooling.
This project was inspired by a two hour conversation I had with someone on the experience of web development and if it is terrible or not. The premise they argued was that `x` browser doesn't support `y` feature while `z` browser does. Eventually, I agreed with him on this and checked made this plugin to save web developers from having to memorize browser compatibility of specs.
## Related
* [ast-metadata-inferer](https://github.com/amilajack/ast-metadata-inferer)
* [compat-db](https://github.com/amilajack/compat-db)
## Contributors
### Code Contributors
This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
### Financial Contributors
Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/eslint-plugin-compat/contribute)]
#### Individuals
#### Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/eslint-plugin-compat/contribute)]
