Ramda - Conditional function

<!DOCTYPE html>
<html>

  <head>
    <script data-require="ramda@0.22.1" data-semver="0.22.1" src="https://unpkg.com/ramda@0.22.1/dist/ramda.min.js"></script>
    <link rel="stylesheet" href="style.css" />
    
  </head>

  <body>
    <div id="output"></div>
    <script src="script.js"></script>
  </body>

</html>

// const R = require('ramda')

const products = [
  {name: 'Jeans', price:80, category: 'clothes'},
  {name: 'Cards', price: 5, category: 'games'},
  {name: 'iPhone', price: 649, category: 'electronics'},
  {name: 'Freakonomics', price: 30, category: 'books'}]

const pLens = R.lensProp('price')
const applyDiscount = R.curry((perc, amt) => amt - (amt * (perc/100)))

// v0 - Apply discount to all products
// const adjustPrice = R.over(pLens, applyDiscount(50))

// v1 - ifElse to apply 2 different discounts
// const adjustPrice = R.ifElse(
//   R.propEq('category', 'clothes'), 
//   R.over(pLens, applyDiscount(50)),
//   R.over(pLens, applyDiscount(10))
// )

// v2 - ifElse to apply only one discount
// const adjustPrice = R.ifElse(
//   R.propEq('category', 'clothes'), 
//   R.over(pLens, applyDiscount(50)),
//   R.identity
// )

// v3 - Use when for a single condition
// const adjustPrice = R.when(
//   R.propEq('category', 'clothes'), 
//   R.over(pLens, applyDiscount(50))
// )

// v4 - use unless for a single condition (opposite behavior of when)
// const adjustPrice = R.unless(
//   R.propEq('category', 'clothes'), 
//   R.over(pLens, applyDiscount(50))
// )

// v5 - Handle multiple conditions with cond
const adjustPrice = R.cond([
  [R.propEq('category', 'clothes'), R.over(pLens, applyDiscount(50))],
  [R.propEq('category', 'electronics'), R.over(pLens, applyDiscount(10))],
  [R.propEq('category', 'books'), R.over(pLens, applyDiscount(100))],
  [R.T, R.identity]
])


const result = R.map(adjustPrice, products)
console.clear()
console.log(result)
document.getElementById('output').innerHTML = `${JSON.stringify(result)}`

/* Styles go here */