How to detect "double taps" (ou double click) in Litecanvas

code.js

litecanvas();

use(pluginDoubleTap)

const actor = {}

function init() {
  actor.x = W/2
  actor.y = H/2

  // on "double tap" move our actor
  listen('DoubleTap', (x, y) => {
    actor.x = x
    actor.y = y
  })
}

function draw() {
  cls(0)
  circfill(actor.x, actor.y, 20, 4)
}

// the "double tap" plugin
function pluginDoubleTap(engine) {
  const lastTap = new Map()
  let timeoutId = 0
  engine.listen('tapped', (x, y, id) => {
    const maxInterval = 0.3
    const maxDist = 16
    if (!lastTap.has(id)) {
      // store the first tap
      lastTap.set(id, {x, y, t: T})
      timeoutId = setTimeout(
        () => lastTap.delete(id), 
        50 + maxInterval*1000
      )
    } else {
      const prev = lastTap.get(id)
      // check that no more than 300 ms have
      // passed between the first and second tap
      if (T - prev.t <= maxInterval && hypot(x - prev.x, y - prev.y) < maxDist) {
        emit('DoubleTap', x, y)
      }
      lastTap.delete(id)
      clearTimeout(timeoutId)
    }
  })
}

Live Demo