Manipulando Datas - ErickWedel YouTube.mjs

import assert from 'assert'
const date = new Date("2022-01-25 00:00") // node -p 'new Date("2022-01-25 00:00")'
// 2022-01-25T03:00:00.000Z

{
  const regex = /^([0-9]{4})-(0[1-9]|1[0-2])-(0[1-9]|1[0-9]|2[0-9]|3[0-1])/
  const [full, year, month, day] = regex.exec(date.toISOString())
  const actual = `${day}/${month}/${year}`
  const expected = "25/01/2022"
  assert.equal(actual, expected)
}

// toLocaleDateString
const options = {
  year: "numeric",
  month: "long",
  day: "numeric"
}

{
  const actual = date.toLocaleDateString("pt-br", options)
  const expected = "25 de janeiro de 2022"
  assert.equal(actual, expected)
}

{
  const actual = date.toLocaleDateString("pt-br", {
    ...options,
    month: "numeric"
  })
  const expected = "25/01/2022"
  assert.equal(actual, expected)
}

// Intl
{
  const actual = new Intl.DateTimeFormat("pt-br").format(date)
  const expected = "25/01/2022"
  assert.equal(actual, expected)
}
{
  const actual = new Intl.DateTimeFormat("pt-br", {
    dateStyle: "full", timeStyle: "long"
  }).format(date)
  const expected = "terça-feira, 25 de janeiro de 2022 00:00:00 BRT"
  assert.equal(actual, expected)
}