Polyfills and shims

12-month change compares the average of the last 4 weeks of downloads with the first 4 weeks of the 52-week series. Gzip size is for the whole package, as measured by Bundlephobia. "-" means the value has not been fetched.

• configurable-date-input-polyfillThe last Date-Input-Polyfill you will ever need. Automatically adds datepickers to input[type=date] on IE, Firefox, and OS X Safari. Configurable localization and start of week day.
• ember-string-ishtmlsafe-polyfillA polyfill for Ember.String.isHtmlSafe.
• @hazae41/symbol-dispose-polyfillPolyfill for Symbol.dispose and Symbol.asyncDispose
• time-input-polyfillAn accessible polyfill for `[input type='time']` elements modeled after the Chrome & Firefox desktop implementations.
• fs-access-compatfs.access ponyfill for older versions of Node.js
• polyfill-text-encoder-streamThis is a polyfill for TextEncoderStream.
• ie11-custom-propertiesCustom Properties polyfill for IE11.
• @jchip/errorutilities and polyfill for node.js errors
• @uupaa/dynamic-import-polyfillimportModule() is a polyfill of import().
• pad-endES7 spec-compliant String.prototype.padEnd shim.
• delayed-scroll-restoration-polyfillPolyfill that mimics Chrome's scroll restoration behavior.
• node-contains`Node#contains()` cross browser polyfill
• @virtualstate/navigationNative JavaScript [navigation](https://developer.mozilla.org/en-US/docs/Web/API/Navigation_API) implementation
• @prestashop-core/jquery.live-polyfillA jquery polyfill for the old, removed $.live() method
• array.prototype.fillArray.prototype.fill polyfill
• @gjsify/node-polyfillsMeta package: all @gjsify Node.js polyfill packages as dependencies
• location-originPolyfill for window.location.origin
• array.prototype.indexofAn ES2015 spec-compliant `Array.prototype.indexOf` shim/polyfill/replacement that works as far down as ES3.
• date-input-polyfill-reactAutomatically adds datepickers to input[type=date] on IE, Firefox, and OS X Safari.
• blob.jsAn HTML5 Blob implementation
• react-native-fetch-blobA module provides upload, download, and files access API. Supports file stream read/write for process large files.
• focusinFocusin/focusout polyfill for Firefox
• get-own-property-symbolsget-own-property-symbols ========================
• @gjsify/dom-exceptionDOMException polyfill for GJS (WebIDL standard)
• @gjsify/webassemblyWebAssembly Promise-API polyfill for GJS — wraps the synchronous Module/Instance constructors that work in SpiderMonkey 128+.
• @gjsify/web-globalsUnified Web API globals for GJS — single import for all Web standard polyfills
• @gjsify/web-polyfillsMeta package: all @gjsify Web API polyfill packages as dependencies
• es6-promisesES6 Promise polyfill
• layout-zoomReact component that scales content up or down and has it actually affect layout — CSS zoom semantics from transform: scale() in an explicitly sized wrapper, without WebKit's zoom font-metric bugs.
• show-open-file-pickerA cross-browser ponyfill or polyfill for showOpenFilePicker
• es6-promise-tryPromise.try shim for ES6 Promises
• array.prototype.tosplicedAn ESnext spec-compliant `Array.prototype.toSpliced` shim/polyfill/replacement that works as far down as ES3.
• angular-polyfillsAll polyfills suggested by the Angular team
• string-replace-all-ponyfill`String.prototype.replaceAll` ponyfill.
• als-browserBrowser polyfill for Node.js AsyncLocalStorage
• aggregate-error-ponyfillAggregateError ponyfill.
• map.groupbyAn ESnext spec-compliant `Map.groupBy` shim/polyfill/replacement that works as far down as ES3.
• sdp-translatorA simple SDP interoperability layer for Unified Plan/Plan B
• ember-let-polyfillA polyfill for the `let` helper in Ember < 3.2
• @open-wc/webpack-index-html-pluginPlugin for generating a index html with webpack
• match-containerPolyfill for the proposed Element.matchContainer() API which is the corresponding scripting API to the @container query CSS feature.
• utf16-char-codesGet location of code point in a string or get code points from string
• path-formatNode.js path.format() polyfill
• spo-gpoA small polyfill for Object.setprototypeof and Object.getPrototypeOf
• babel-plugin-es6-promiseBabel plugin that rewrites Promise references to es6-promise, but only if necessary
• new-event-polyfillnew Event() polyfill
• sm-polyfillSM2/SM3/SM4 polyfill for Node.js 16 and earlier. Provides SM2 signing/verification using sm-crypto when native OpenSSL support is unavailable.
• datalist-polyfillA minimal and dependency-free vanilla JavaScript datalist polyfill. Supports all standard's functionality as well as mimics other browsers behavior.
• @ungap/raw-jsonJSON.rawJSON and isRawJSON ponyfill
• steal-es6-module-loaderAn ES6 Module Loader shim

• scroll-into-view-if-needed vs @juggle/resize-observer
• css-vars-ponyfill vs object-fit-images