Test if a value is a number having an integer value.

Test if a value is null.

Test if a value is a Slice object.

Test if a value is undefined.

Insert supplied variable values into a format string.

stdlib TypeScript type declarations.

Define a non-enumerable read-only accessor.

Define a non-enumerable read-only property.

Format an error message for production.

Test if an object has a specified property.

Test if an object has a specified property, either own or inherited.

Test whether a value has in its prototype chain a specified constructor as a prototype property.

Test if a value is an array.

Test if a value is a function.

Test if a value is a number having a nonnegative integer value.

Test if a value is a plain object.

Test if a value is a string.

Slice 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.