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.
Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value an ES BigInt?
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
Inspect utility for Node.js and browsers
Determine if the JS environment has BigInt support.
Determine if a function is a native async function.
Retrieve function name and line number from a function reference
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.
Is this value a JS Map? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
A robust, ES3 compatible, "has own property" predicate.
Does the current environment have `import()` support?
Is this value a JS SharedArrayBuffer?
return the first argument that is `!== undefined`
Which kind of boxed JS primitive is this?
Robustly get the byte length of a Typed Array
Robustly get the byte offset of a Typed Array
What is the type of this builtin JS value?
Get the byte length of an ArrayBuffer, even in engines without a `.byteLength` method.