Get the byte length of an ArrayBuffer, even in engines without a `.byteLength` method.
Robustly get the byte length of a Typed Array
compare SPDX license expressions
Like a Set, but provides the index of the `key` in the backing array
Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?
ES2015-compliant shim for Object.is - differentiates between -0 and +0
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.
Robustly get an object's own property keys (strings and symbols), including non-enumerables when possible
Get and robustly cache all JS language-level intrinsics at first require time
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
TypeScript definitions for power-assert
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
A querystring parser that supports nesting and arrays, with a depth limit
validate SPDX license expressions
Store information about any JS value in a side channel. Uses WeakMap if available.
parse SPDX license expressions
Does this JS environment support the `name` property on functions?
If available, the `Object.prototype.__proto__` accessor and mutator, call-bound
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
code-red
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
ES6 spec-compliant RegExp.prototype.flags shim.
ES5 spec-compliant shim for String.prototype.trim