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const boton = document.getElementById('boton')
const pulsacionLarga = 3000

boton.addEventListener('mousedown', event => {
  boton._clickStarted = Date.now()
}, false)

boton.addEventListener('mouseup', event => {
  const tiempoPulsado = Date.now() - boton._clickStarted

  if (tiempoPulsado < 100) {
    console.info('pulsacion normal')
  }

  if (tiempoPulsado >= pulsacionLarga) {
    console.info('pulsacion larga')
  }
}, false)