This library determines the built-in type of a JavaScript value, working cross-realm and without relying on `instanceof` or the `constructor` property. It supports a wide range of built-in types, including primitives, objects, arrays, typed arrays, and functions. The project is ideal for developers who need a reliable way to identify JavaScript value types in complex environments.
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Support the dependencies of inspect-js/which-builtin-type
Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.
An ES2015 spec-compliant `Function.prototype.name` shim
Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.
Determine if a function is a native async function.
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Determine if a function is a native generator function.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Array#isArray for older browsers
Which kind of boxed JS primitive is this?
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
A CLI tool for arethetypeswrong.github.io
My shareable eslint config
My personal tsconfig(s), so my open source projects can share them.
TypeScript definitions for for-each
TypeScript definitions for function.prototype.name
TypeScript definitions for make-arrow-function
TypeScript definitions for make-async-function
TypeScript definitions for object-inspect
TypeScript definitions for object.assign
TypeScript definitions for tape
Command line tool for generating a changelog from git tags and commit history
Returns an array of Typed Array names that are available in the current environment
Convert encodings, uses iconv-lite
Evaluates javascript code blocks from markdown files.
A better forEach
Determine if the JS environment has BigInt support.
Determine if the JS environment has Symbol support. Supports spec, or shams.
Detect if we were run as a result of `npm publish`
Function that returns an arbitrary arrow function, or undefined if arrow function syntax is unsupported.
Function that returns an arbitrary `async function`, or undefined if `async function` syntax is unsupported.
Returns an arbitrary generator function, or undefined if generator syntax is unsupported.
Command line tool for creating or updating a .npmignore file based on .gitignore.
the Istanbul command line interface
string representations of objects in node and the browser
ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim
Ensure that when you `npm publish`, the "latest" tag is only set for the truly latest version.
tap-producing test harness for node and browsers
TypeScript is a language for application scale JavaScript development
Support the repos that depend on this repository
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ljharb
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