Super basic text diff probe via terser

index.js

'use strict'

const { exec } = require('child_process')
const assert = require('assert')
const fs = require('fs')
const path = require('path')
const util = require('util')
const { minify } = require('terser')

const readFile = util.promisify(fs.readFile)
const minifyOptions = { format: { comments: false } }

// Read target file paths in `argv` array
const [,, prevMaybe, nextMaybe] = process.argv

// Run command
differ(prevMaybe, nextMaybe)

async function differ(next = '', prev = '') {
  try {
    const nextInput = await readFile(next, 'utf8')
    const nextInputMinified = await minify(nextInput, minifyOptions)

    const prevInput = await readFile(prev, 'utf8')
    const prevInputMinified = await minify(prevInput, minifyOptions)

    assert.equal(prevInputMinified.code, nextInputMinified.code)
  } catch (e) {
    console.log(e)
  }
}

package.json

{
  "name": "tersimonious-differ",
  "version": "0.0.0",
  "description": "Throws if terser output for a couple of files is different",
  "main": "index.js",
  "scripts": {
    "test": "node index.js index.js index.js"
  },
  "license": "ISC",
  "dependencies": {
    "terser": "^5.5.1"
  }
}