Replacements for istanbul-lib-coverage

istanbul-lib-coverage is no longer maintained.

@vitest/istanbul-lib-coverage

The Vitest team publishes @vitest/istanbul-lib-coverage, a maintained fork that keeps the same API. The exported functions and classes keep their existing names, so in most projects the only change is the package you import from.

import { createCoverageMap } from 'istanbul-lib-coverage'
import { createCoverageMap } from '@vitest/istanbul-lib-coverage'

const map = createCoverageMap(coverageData)

Compared to the original it is:

• Actively maintained
• Shipped as ESM instead of CommonJS only
• Bundled with its own type definitions, so you no longer need @types/istanbul-lib-coverage

NOTE

The fork is ESM-only and sets engines.node to >=22, so switching is a larger jump than a plain import swap for projects still on CommonJS or an older Node version.

If you also depend on @types/istanbul-lib-coverage only for this package, you can drop it once you migrate, since the fork ships its own types.