const v8toIstanbul = require('v8-to-istanbul')
// the path to the original source-file is required, as its contents are
// used during the conversion algorithm.
const converter = v8toIstanbul('./path-to-instrumented-file.js')
await converter.load() // this is required due to async file reading.
// provide an array of coverage information in v8 format.
converter.applyCoverage([
  {
    "functionName": "",
    "ranges": [
      {
        "startOffset": 0,
        "endOffset": 520,
        "count": 1
      }
    ],
    "isBlockCoverage": true
  },
  // ...
])
// output coverage information in a form that can
// be consumed by Istanbul.
console.info(JSON.stringify(converter.toIstanbul()))

const myVariable = 99
/* v8 ignore next */
if (process.platform === 'win32') console.info('hello world')

const myVariable = 99
/* v8 ignore next 3 */
if (process.platform === 'win32') {
  console.info('hello world')
}

/* v8 ignore start */
function dontMindMe() {
  // ...
}
/* v8 ignore stop */

const myVariable = 99
const os = process.platform === 'darwin' ? 'OSXy' /* v8 ignore next */ : 'Windowsy'