@angular/cdk/fesm2022/_passive-listeners-chunk.mjs

Angular Material Component Development Kit

let supportsPassiveEvents;
function supportsPassiveEventListeners() {
  if (supportsPassiveEvents == null && typeof window !== 'undefined') {
    try {
      window.addEventListener('test', null, Object.defineProperty({}, 'passive', {
        get: () => supportsPassiveEvents = true
      }));
    } finally {
      supportsPassiveEvents = supportsPassiveEvents || false;
    }
  }
  return supportsPassiveEvents;
}
function normalizePassiveListenerOptions(options) {
  return supportsPassiveEventListeners() ? options : !!options.capture;
}

export { normalizePassiveListenerOptions, supportsPassiveEventListeners };
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