json.ts

Filename	Percent	Threshold	Total	Covered	Uncovered
src/lib/reporters/json.ts	100.00%	0%	29	29	0

import { CoverageData } from "../getCoverage";
import fs from "fs";
import path from "path";

type Options = {
  outputDir: string;
  threshold: number;
};

export const generate = async (
  coverageData: CoverageData,
  options: Options
): Promise<void> => {
  // Maps cannot be serialized in JSON.stringify
  const serializableFileCounts = Object.fromEntries(coverageData.fileCounts);

  await fs.promises.writeFile(
    path.join(options.outputDir, "typescript-coverage.json"),
    JSON.stringify(
      {
        ...coverageData,
        fileCounts: serializableFileCounts
      },
      null,
      2
    )
  );
};

[]

TypeScript Coverage Report generated by type-coverage and typescript-coverage-report at Mon, 28 Sep 2026 15:27:03 GMT

TypeScript coverage report