Robust, framework-agnostic in-memory data store.
Determine if the JS environment has Symbol support. Supports spec, or shams.
Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.
Determine if the current node version supports the `--preserve-symlinks` flag.
javascript standard data structure library which benchmark against C++ STL
Is this specifier a node.js core module?
Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.
Does this JS environment support the `name` property on functions?
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.
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Returns an array of Typed Array names that are available in the current environment
Determine if a function is a native generator function.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
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 Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value negative zero? === will lie to you
Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.
Determine if a value is an ES6 Symbol or not.
simplified stream construction
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Determine if the JS environment has BigInt support.