A controller that writes extended classes' tag names into the "instanceof" attribute.

Check if a value is a regular expression

Edit a string with the users preferred text editor using $VISUAL or $ENVIRONMENT

A query library for ECMAScript AST using a CSS selector like query language.

This plugin transforms all the ES2015 'instanceof' methods

Additional JSON-Schema keywords for Ajv JSON validator

a CSS selector parser

Remove JSX attribute

Add JSX attribute

Disallows use of instanceof operator, useful in TS envs where code relies purely on structural typing (i.e. static typing based on presence of attributes)

Core interfaces, types, and crypto abstraction for otplib

Replace JSX attribute value

A library to make errors.

Test whether a value has in its prototype chain a specified constructor as a prototype property.

Returns an array of all tabbable DOM nodes within a containing node.

Emmet standalone abbreviation parser

Enable support for case insensitive attribute matching in selectors

Transform SVG into JSX

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

utility to create a universal WebWorker from a function