This plugin transforms all the ES2015 'instanceof' methods

Create custom JavaScript errors that also match instanceof.

JavaScript all types detection module (crossbrowser)

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

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

This plugin transforms all the ES2015 'instanceof' methods

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.

Like instanceof, but uses class name strings.

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)

Functional instanceof.

The instanceof mechanism cross package/module versions.

Fix for instanceof issues.

Define errors without frills, but with stack traces and instanceof support.

Call your functions using instanceof operator (drunk programming only)

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

Alternative to instanceof compatible with partial HMR.

HTTP response errors with default message, stacktrace, instanceof, error cause support and more.

Workaround for subclassing errors. Both instanceof and stack are functional.

Custom keywords for ata-validator (instanceof, typeof)