@glidejs/glide/src/utils/detect-passive-event.js

Glide.js is a dependency-free JavaScript ES6 slider and carousel. It’s lightweight, flexible and fast. Designed to slide. No less, no more

/**
 * Test via a getter in the options object to see
 * if the passive property is accessed.
 *
 * @see https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md#feature-detection
 */

let supportsPassive = false

try {
  let opts = Object.defineProperty({}, 'passive', {
    get () {
      supportsPassive = true
    }
  })

  window.addEventListener('testPassive', null, opts)
  window.removeEventListener('testPassive', null, opts)
} catch (e) {}

export default supportsPassive