How do I change file extension with javascript?

filePathReplace.js

// https://stackoverflow.com/a/47949440/1366033
function changeExt(fileName, newExt) {
  var pos = fileName.includes(".") ? fileName.lastIndexOf(".") : fileName.length
  var fileRoot = fileName.substr(0, pos)
  var output = `${fileRoot}.${newExt}`
  return output
}


console.log(changeExt("img.jpeg", "jpg"))             // img.jpg
console.log(changeExt("img.name.jpeg", "jpg"))        // img.name.jpg
console.log(changeExt("host", "csv"))                 // host.csv
console.log(changeExt(".graphqlrc", "graphqlconfig")) // .graphqlconfig

Hey Lakhan, sounds like you'd have to tap into the OS in order to handle copy /paste folder operations. This solution is really just targeted at change the string of a file. You could leverage that in a node job, but there's a lot of other work involved - you might want to ask about it on stack overflow if you can give a clear example of what you're looking to accomplish and what you've tried.