Insert supplied variable values into a format string.

stdlib TypeScript type declarations.

Format an error message for production.

Test if an object has a specified property.

Test if a value is a string.

Compute the principal square root of a double-precision floating-point number.

Create a string from a sequence of Unicode code points.

Return an array of an object's own enumerable property names.

Proxies nodejs require in order to allow overriding dependencies during testing.

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.