ECMAScript spec abstract operations.
JavaScript
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Support the dependencies of ljharb/es-abstract
Robustly `.call.bind()` a function
Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.
A simple cache for a few of the JS Error constructors.
ES Object-related atoms: Object, ToObject, RequireObjectCoercible
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
An ES2015 spec-compliant `Function.prototype.name` shim
Get and robustly cache all JS language-level intrinsics at first require time
`Object.getOwnPropertyDescriptor`, but accounts for IE's broken implementation.
Determine if the JS environment has Symbol support. Supports spec, or shams.
A robust, ES3 compatible, "has own property" predicate.
ES spec-like internal slots
Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
string representations of objects in node and the browser
ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim
ES6 spec-compliant RegExp.prototype.flags shim.
Get the byte length of an ArrayBuffer, even in engines without a `.byteLength` method.
ES spec-compliant shim for ArrayBuffer.prototype.slice
Returns an array of Typed Array names that are available in the current environment
Get the ArrayBuffer out of a DataView, robustly.
Get the byteLength out of a DataView, robustly.
Get the byteOffset out of a DataView, robustly.
`Object.defineProperty`, but not IE 8's broken one.
A helper to optimistically set Symbol.toStringTag, when possible.
Robustly get the [[Prototype]] of an object
ECMAScript spec-compliant polyfill/shim for `globalThis`
Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.
Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?
Is this value a JS DataView? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.
Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.
Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.
An Object.keys replacement, in case Object.keys is not available. From https://github.com/es-shims/es5-shim
Is this value a JS SharedArrayBuffer?
`Array.prototype.concat`, but made safe by ignoring Symbol.isConcatSpreadable
Push an array of items into an array, while being robust against prototype modification
Give a regex, get a robust predicate function that tests it against a string.
Robustly set the [[Prototype]] of an object
ES2019 spec-compliant String.prototype.trimEnd shim.
ES2019 spec-compliant String.prototype.trimStart shim.
ES Math-related intrinsics and helpers, robustly cached.
Robustly get an object's own property keys (strings and symbols), including non-enumerables when possible
ES5 spec-compliant shim for String.prototype.trim
Robustly get the byte length of a Typed Array
Unbox a boxed JS primitive value.
Get the ArrayBuffer out of a TypedArray, robustly.
Robustly get the byte offset of a Typed Array
Robustly get the length of a Typed Array
Is this value a JS ArrayBuffer?
Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Support the repos that depend on ljharb/es-abstract
An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.
ES proposal-spec-compliant Object.fromEntries shim.
An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.
Spec-compliant polyfill for String.prototype.matchAll
Dynamics Contract
An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.
This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
ES5 spec-compliant shim for String.prototype.trim
Gassefals
ES spec-compliant shim for Object.hasOwn
Zona X MOD
An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.
ES spec-compliant shim for ArrayBuffer.prototype.slice
An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible
An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.
An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.
ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.
ES Proposal spec-compliant shim for Promise.allSettled
An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.
An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.
An ESnext spec-compliant `Array.prototype.toReversed` shim/polyfill/replacement that works as far down as ES3.
An ES5 spec-compliant `Array.prototype.map` shim/polyfill/replacement that works as far down as ES3.
An ES5 spec-compliant `Array.prototype.reduce` shim/polyfill/replacement that works as far down as ES3.
ES Proposal spec-compliant shim for Promise.prototype.finally
ES2017 spec-compliant String.prototype.padStart shim.
ES2017 spec-compliant String.prototype.padEnd shim.
An ES5 spec-compliant `Array.prototype.filter` shim/polyfill/replacement that works as far down as ES3.
Array.prototype.find ES6 polyfill.
A robust & optimized `String.prototype.repeat` polyfill, based on the ECMAScript 6 specification.
This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
A robust & optimized `String.prototype.startsWith` polyfill, based on the ECMAScript 6 specification.
This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
ES 2021 spec-compliant shim for Promise.any
Array.prototype.findIndex ES2015 polyfill.
Spec-compliant polyfill for String.prototype.replaceAll ESnext proposal
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