List file names in current directory (without extension)

list_files.js

const fs = require('fs')
const path = require('path')

const files = []

fs.readdirSync(__dirname).forEach(file => {
  const i = file.indexOf(path.basename(file))
  const j = file.indexOf(path.extname(file))
  files.push(file.substring(i, j))
})

console.log(JSON.stringify(files, null, 2))