stdlib-js/assert-is-nan

Test if a value is a number.

Test if a double-precision floating-point numeric value is NaN.

Define a non-enumerable read-only property.

Detect native Symbol support.

Test if a value is a boolean.

Number constructor.

Symbols.

tap-producing test harness for node and browsers

Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests and browser tests. Built for scale

Minimal TAP output formatter.

Benchmark harness.