core-js-compat
Advanced tools
Package description
The core-js-compat package provides compatibility data for core-js, which is a modular standard library for JavaScript, including polyfills for ECMAScript up to the latest standards. It is useful for developers who need to know which features are available in core-js for a specific version of a browser or Node.js.
Compatibility Data Retrieval
Retrieve a list of features supported by core-js for a specific environment, such as Chrome 70.
const { list } = require('core-js-compat')({ targets: 'chrome 70' });Custom Build Generation
Generate a list of core-js modules required to support a specific target, such as Internet Explorer 11, with a specific version of core-js.
const { getModulesListForTargetVersion } = require('core-js-compat');
const modulesList = getModulesListForTargetVersion({ targets: { ie: 11 }, version: '3.6' });Babel-polyfill is a package that includes Babel transforms and a polyfill that includes a custom regenerator runtime and core-js. It is similar to core-js-compat in that it provides polyfills for ECMAScript features, but it is less modular and is deprecated in favor of directly including core-js and regenerator-runtime.
The es6-shim package provides polyfills for ECMAScript 6 (also known as ECMAScript 2015) features. It is similar to core-js-compat in providing polyfills, but it is focused only on ES6 features and does not provide the modular approach or the compatibility data that core-js-compat offers.
The polyfill-service package by Financial Times provides a service that returns a set of polyfills based on the user-agent string of the browser making the request. It is similar to core-js-compat in that it aims to provide polyfills for compatibility, but it does so as a service rather than a package to include in your project.
Changelog
ToBigInt / ToNumber conversion of the argument passed to %TypedArray%.prototype.fill in V8 ~ Chrome < 59, Safari < 14.1, FF < 55, Edge <=18DeletePropertyOrThrow in IE9-TypeError instead of Error) on incorrect exec result in RegExp.prototype.test polyfill{ actual, full, features }/typed-array/at entriesReadme
core-js-compat package contains data about the necessity of core-js modules and API for getting a list of required core-js modules by browserslist query.
import compat from 'core-js-compat';
const {
list, // array of required modules
targets, // object with targets for each module
} = compat({
targets: '> 1%', // browserslist query or object of minimum environment versions to support, see below
modules: [ // optional list / filter of modules - regex, sting or an array of them:
'core-js/actual', // - an entry point
'esnext.array.unique-by', // - a module name (or just a start of a module name)
/^web\./, // - regex that a module name must satisfy
],
exclude: [ // optional list / filter of modules to exclude, the signature is similar to `modules` option
'web.atob',
],
version: '3.22', // used `core-js` version, by default - the latest
});
console.log(targets);
/* =>
{
'es.error.cause': { ios: '14.5-14.8', samsung: '16.0' },
'es.aggregate-error.cause': { ios: '14.5-14.8', samsung: '16.0' },
'es.array.at': { ios: '14.5-14.8' },
'es.object.has-own': { ios: '14.5-14.8', samsung: '16.0' },
'es.string.at-alternative': { ios: '14.5-14.8' },
'es.typed-array.at': { ios: '14.5-14.8' },
'es.typed-array.set': { samsung: '16.0' },
'esnext.array.find-last': { firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.find-last-index': { firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.group-by': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.group-by-to-map': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.to-reversed': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.to-sorted': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.to-spliced': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.unique-by': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.array.with': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.typed-array.find-last': { firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.typed-array.find-last-index': { firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.typed-array.to-reversed': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.typed-array.to-sorted': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.typed-array.to-spliced': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'esnext.typed-array.with': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'web.dom-exception.stack': { chrome: '98', edge: '99', ios: '14.5-14.8', samsung: '16.0' },
'web.immediate': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' },
'web.structured-clone': { chrome: '98', edge: '99', firefox: '98', ios: '14.5-14.8', samsung: '16.0' }
}
*/
targets optiontargets could be a browserslist query or a targets object that specifies minimum environment versions to support:
// browserslist query:
'defaults, not IE 11, maintained node versions'
// object:
{
android: '4.0', // Android WebView version
chrome: '38', // Chrome version
deno: '1.12', // Deno version
edge: '13', // Edge version
electron: '5.0', // Electron framework version
firefox: '15', // Firefox version
ie: '8', // Internet Explorer version
ios: '13.0', // iOS Safari version
node: 'current', // NodeJS version, you could use 'current' for set it to currently used
opera: '12', // Opera version
opera_mobile: '7', // Opera Mobile version
phantom: '1.9', // PhantomJS headless browser version
rhino: '1.7.13', // Rhino engine version
safari: '14.0', // Safari version
samsung: '14.0', // Samsung Internet version
esmodules: true, // That option set target to minimum supporting ES Modules versions of all browsers
browsers: '> 0.25%', // Browserslist query or object with target browsers
}
// equals of of the method from the example above
require('core-js-compat/compat')({ targets, modules, version }); // => { list: Array<ModuleName>, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }
// or
require('core-js-compat').compat({ targets, modules, version }); // => { list: Array<ModuleName>, targets: { [ModuleName]: { [EngineName]: EngineVersion } } }
// full compat data:
require('core-js-compat/data'); // => { [ModuleName]: { [EngineName]: EngineVersion } }
// or
require('core-js-compat').data; // => { [ModuleName]: { [EngineName]: EngineVersion } }
// map of modules by `core-js` entry points:
require('core-js-compat/entries'); // => { [EntryPoint]: Array<ModuleName> }
// or
require('core-js-compat').entries; // => { [EntryPoint]: Array<ModuleName> }
// full list of modules:
require('core-js-compat/modules'); // => Array<ModuleName>
// or
require('core-js-compat').modules; // => Array<ModuleName>
// the subset of modules which available in the passed `core-js` version:
require('core-js-compat/get-modules-list-for-target-version')('3.22'); // => Array<ModuleName>
// or
require('core-js-compat').getModulesListForTargetVersion('3.22'); // => Array<ModuleName>
If you want to add new / update data about modules required for target engines, follow this instruction.
FAQs
Unknown package
We found that core-js-compat demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Cyber insurance rates are dropping as the market matures, according to a new report projecting global premiums to reach $43 billion by 2030, driven by international market uptake and growth in the SME sector.
Research
Security News
Socket researchers unpack a typosquatting package with malicious code that logs keystrokes and exfiltrates sensitive data to a remote server.
Security News
The JavaScript community has launched the e18e initiative to improve ecosystem performance by cleaning up dependency trees, speeding up critical parts of the ecosystem, and documenting lighter alternatives to established tools.