Test if a value is undefined or null.
Test if a value is a URI.
Is this specifier a node.js core module?
Test if a value is an array-like object containing only functions.
Return an accessor function for setting an element in an indexed array-like object.
Reinterpret a Complex64Array as a Float32Array.
Test if a value is iterable-like.
BLAS memory layouts.
Reinterpret a Complex128Array as a Float64Array.
Test if an input value is a supported ndarray complex-valued floating-point data type.
Synchronous validation of a path existing either as a file or as a directory.
Return the index of the first element which equals a provided search element according to the same value algorithm.
Test if two double-precision floating-point numbers are the same value.
Test if an object's prototype chain contains a provided prototype.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
Test whether two double-precision complex floating-point numbers are the same value.
Test if a value is a BigInt.
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.
Multidimensional arrays.
Strided.
Test if an input value is a supported ndarray real-valued data type.
Standard math.
Test if an input value is a supported built-in ndarray data type string.
Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.