CFP - Docs - isAtOrAfter

isAtOrAfter

(date1: date) => (date2: date) => boolean

Test if a date is the same as or after another

Try It

const janFirst2025 = new Date('2025 1 1')
const isAtOrAfterJanFirst2025 = isAtOrAfter(janFirst2025)

const now = new Date()
isAtOrAfterJanFirst2025(now) // is true

const decFirst2024 = new Date('2024 12 1')
isAtOrAfterJanFirst2025(decFirst2024) // is false

isAtOrAfterJanFirst2025(janFirst2025) // is true
const janFirst2025 = new Date('2025 1 1')
const isAtOrAfterJanFirst2025 = isAtOrAfter(janFirst2025)

const now = new Date()
isAtOrAfterJanFirst2025(now) // is true

const decFirst2024 = new Date('2024 12 1')
isAtOrAfterJanFirst2025(decFirst2024) // is false

isAtOrAfterJanFirst2025(janFirst2025) // is true

Try It

const janFirst2025 = new Date('2025 1 1')
const isAtOrAfterJanFirst2025 =
  isAtOrAfter(janFirst2025)

const now = new Date()
isAtOrAfterJanFirst2025(now) // is true

const decFirst2024 = new Date('2024 12 1')
isAtOrAfterJanFirst2025(decFirst2024) // is false

isAtOrAfterJanFirst2025(janFirst2025) // is true
const janFirst2025 = new Date('2025 1 1')
const isAtOrAfterJanFirst2025 =
  isAtOrAfter(janFirst2025)

const now = new Date()
isAtOrAfterJanFirst2025(now) // is true

const decFirst2024 = new Date('2024 12 1')
isAtOrAfterJanFirst2025(decFirst2024) // is false

isAtOrAfterJanFirst2025(janFirst2025) // is true

Sometimes we need to compare dates. Below, we have some tablets sent in for repair. Those under warranty can be repaired now, so let's find them.

Try It

const tabletsOnDesk = [
  {
    name: 'Samsung Galaxy',
    purchaseDate: new Date('2024 6 11'),
  },
  {
    name: 'OnePlus Pad',
    purchaseDate: new Date('2023 9 21'),
  },
]

const janFirst2024 = new Date('2024 1 1')
const isEligibleForWarranty = compose([
  get('purchaseDate'),
  isAtOrAfter(janFirst2024),
])

const tabletsToRepair = tabletsOnDesk.filter(isEligibleForWarranty)
console.log(tabletsToRepair)
// is [
//   {
//     name: Samsung Galaxy
//     purchaseDate: 2024 6 11
//   }
// ]
type Tablet = {
  name: string
  purchaseDate: Date
}

const tabletsOnDesk: Tablet[] = [
  {
    name: 'Samsung Galaxy',
    purchaseDate: new Date('2024 6 11'),
  },
  {
    name: 'OnePlus Pad',
    purchaseDate: new Date('2023 9 21'),
  },
]

const janFirst2024 = new Date('2024 1 1')
const isEligibleForWarranty = compose([
  get('purchaseDate')<Tablet>,
  isAtOrAfter(janFirst2024),
])

const tabletsToRepair = tabletsOnDesk.filter(isEligibleForWarranty)
console.log(tabletsToRepair)
// is [
//   {
//     name: Samsung Galaxy
//     purchaseDate: 2024 6 11
//   }
// ]

Try It

const tabletsOnDesk = [
  {
    name: 'Samsung Galaxy',
    purchaseDate: new Date('2024 6 11'),
  },
  {
    name: 'OnePlus Pad',
    purchaseDate: new Date('2023 9 21'),
  },
]

const janFirst2024 = new Date('2024 1 1')
const isEligibleForWarranty = compose([
  get('purchaseDate'),
  isAtOrAfter(janFirst2024),
])

const tabletsToRepair = tabletsOnDesk.filter(
  isEligibleForWarranty
)
console.log(tabletsToRepair)
// is [
//   {
//     name: Samsung Galaxy
//     purchaseDate: 2024 6 11
//   }
// ]
type Tablet = {
  name: string
  purchaseDate: Date
}

const tabletsOnDesk: Tablet[] = [
  {
    name: 'Samsung Galaxy',
    purchaseDate: new Date('2024 6 11'),
  },
  {
    name: 'OnePlus Pad',
    purchaseDate: new Date('2023 9 21'),
  },
]

const janFirst2024 = new Date('2024 1 1')
const isEligibleForWarranty = compose([
  get('purchaseDate')<Tablet>,
  isAtOrAfter(janFirst2024),
])

const tabletsToRepair = tabletsOnDesk.filter(
  isEligibleForWarranty
)
console.log(tabletsToRepair)
// is [
//   {
//     name: Samsung Galaxy
//     purchaseDate: 2024 6 11
//   }
// ]