has-tostringtag

Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

is-typed-array

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.

is-date-object

Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.