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core-js

Standard library

v3.39.0 URL: https://unpkg.com/core-js@3.39.0/index.js

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ES3ES5ES6ES7ES2015ES2016ES2017ES2018ES2019ES2020ES2021ES2022ES2023ES2024ECMAScript 3ECMAScript 5ECMAScript 6ECMAScript 7ECMAScript 2015ECMAScript 2016ECMAScript 2017ECMAScript 2018ECMAScript 2019ECMAScript 2020ECMAScript 2021ECMAScript 2022ECMAScript 2023ECMAScript 2024MapSetWeakMapWeakSetTypedArrayPromiseObservableSymbolIteratorAsyncIteratorURLURLSearchParamsqueueMicrotasksetImmediatestructuredClonepolyfillponyfillshim

internal-slot

ES spec-like internal slots

v1.0.7 URL: https://unpkg.com/internal-slot@1.0.7/index.js

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internalslotinternal slotecmascriptesspecprivatedataprivate dataweakmap

side-channel

Store information about any JS value in a side channel. Uses WeakMap if available.

v1.0.6 URL: https://unpkg.com/side-channel@1.0.6/index.js

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weakmapmapsidechannelmetadata

core-js-pure

Standard library

v3.39.0 URL: https://unpkg.com/core-js-pure@3.39.0/index.js

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ES3ES5ES6ES7ES2015ES2016ES2017ES2018ES2019ES2020ES2021ES2022ES2023ES2024ECMAScript 3ECMAScript 5ECMAScript 6ECMAScript 7ECMAScript 2015ECMAScript 2016ECMAScript 2017ECMAScript 2018ECMAScript 2019ECMAScript 2020ECMAScript 2021ECMAScript 2022ECMAScript 2023ECMAScript 2024MapSetWeakMapWeakSetTypedArrayPromiseObservableSymbolIteratorAsyncIteratorURLURLSearchParamsqueueMicrotasksetImmediatestructuredClonepolyfillponyfillshim

which-collection

Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

v1.0.2 URL: https://unpkg.com/which-collection@1.0.2/index.js

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mapsetweakmapweaksetcollection.es6es2015