Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?
Parses, serializes, and manipulates MIME types, according to the WHATWG MIME Sniffing Standard
Is this value a JS Set? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Is this value a JS WeakSet? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
ES2015-compliant shim for Object.is - differentiates between -0 and +0
Synchronous validation of a path existing either as a file or as a directory.
A querystring parser that supports nesting and arrays, with a depth limit
Robustly get an object's own property keys (strings and symbols), including non-enumerables when possible
correct invalid SPDX expressions
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
comparison renderer for power-assert context
calculates width of given string
diagram renderer for power-assert context
Does this JS environment support the `name` property on functions?
ES6 spec-compliant RegExp.prototype.flags shim.
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. Uses WeakMap if available.
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
If available, the `Object.prototype.__proto__` accessor and mutator, call-bound
ES5 spec-compliant shim for String.prototype.trim
base renderer for power-assert context
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.