Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@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 FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Retrieve function name and line number from a function reference
Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
Determine if the JS environment has BigInt support.
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this an arguments object? It's a harder question than you think.
Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Inspect utility for Node.js and browsers
A robust, ES3 compatible, "has own property" predicate.
Which kind of boxed JS primitive is this?
Retrieve function name and line number from a function reference
Robustly get the byte length of a Typed Array
Get the ArrayBuffer out of a TypedArray, robustly.
Robustly get the byte offset of a Typed Array
Get the byteOffset out of a DataView, robustly.
What is the type of this builtin JS value?
Get the byte length of an ArrayBuffer, even in engines without a `.byteLength` method.
Get the ArrayBuffer out of a DataView, robustly.
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.