ES2015-compliant shim for Object.is - differentiates between -0 and +0
Is this value a JS WeakSet? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Robustly get an object's own property keys (strings and symbols), including non-enumerables when possible
Common assertions for Bats
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Parse the things that can be arguments to `npm install`
Get and robustly cache all JS language-level intrinsics at first require time
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
Helper function for exhaustive checks of discriminated unions in TypeScript
Do things in development and nothing otherwise
A querystring parser that supports nesting and arrays, with a depth limit
parse SPDX license expressions
Store information about any JS value in a side channel. Uses WeakMap if available.
If available, the `Object.prototype.__proto__` accessor and mutator, call-bound
Does this JS environment support the `name` property on functions?
ES6 spec-compliant RegExp.prototype.flags shim.
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Store information about any JS value in a side channel, using a linked list
Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Store information about any JS value in a side channel, using a Map
escape Markdown control characters
Is this value negative zero? === will lie to you
Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.