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Informations about the package eslint-config-target-es
eslint-config-target-es
ESLint shareable config to activate eslint-plugin-es-x checks based on browserslist browser targets and MDN browser compatibility data.
Installation
Generally you'll install this via your package manager, e.g.
Usage
First, you'll probably want to set up a browserslist configuration.
Then you can use this like any other sharable config in your eslint.config.js or .eslintrc.* file. Three configurations are offered.
- To check only for language features, such as nullish coalescing, use the 'language' config.
- To check only for builtins, such as Promise, WeakRef, and various features of RegExp, use the 'builtins' config.
- To check both, use the 'all' config.
For eslint.config.js, that might look like this:
while for eslintrc you'd do like
For backwards compatibility, the eslintrc configs may also be accessed without the /rc/ path component (e.g. as @automattic/eslint-config-target-es/language), and @automattic/eslint-config-target-es is equivalent to @automattic/eslint-config-target-es/rc/all.
Checking built files
If you want to check your built files to make sure you didn't omit transpiling any packages that need transpiling, you might create a validate-es.config.js like this
and then run eslint like
to avoid your standard eslintrc and eslintignore and to avoid errors from any inline directives.
Something similar can be done for flat config.
Advanced usage
You can import or require @automattic/eslint-config-target-es/functions to gain access to some functions that can be used to build your own configuration.
As browserslist and MDN use different browser codes, getAllBrowsers( { query: } ) will take a browserslist query and return an object with the MDN browser codes and the matched versions for each.
getRules( { query:, builtins: } ) will return the rules config. Set builtins true for "builtins", false for "language", or null/undefined for "all".
Caveats
Some browsers supported by browserslist are not availble in the MDN data (e.g. Opera Mini) or are no longer being updated (e.g. Internet Explorer). In cases like these where no data is available, features are assumed to be supported. Set the environment variable DEBUG=@automattic/eslint-config-target-es:warn to generate messages when this happens.
Security
Need to report a security vulnerability? Go to https://automattic.com/security/ or directly to our security bug bounty site https://hackerone.com/automattic.
License
eslint-config-target-es is licensed under GNU General Public License v2 (or later)
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