Detect native Symbol.hasInstance support.

Insert supplied variable values into a format string.

Has instance symbol.

Format an error message for production.

Test if a value is an array.

Test if a value is a boolean.

Boolean constructor.

Function constructor.

Number constructor.

Object constructor.

Implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.

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 ca

Minimal TAP output formatter.

Benchmark harness.