dist/index.js
function updateEventListeners(el, prevEvents, events) {
  var eventName;

  if (!prevEvents || !events || prevEvents === events) {
    return;
  }

  for (eventName in events) {
    // Didn't change.
    if (prevEvents[eventName] === events[eventName]) {
      continue;
    }

    // If changed, remove old previous event listeners.
    if (prevEvents[eventName]) {
      removeEventListeners(el, eventName, prevEvents[eventName]);
    }

    // Add new event listeners.
    addEventListeners(el, eventName, events[eventName]);
  }

  // See if event handlers were removed.
  for (eventName in prevEvents) {
    if (!events[eventName]) {
      removeEventListeners(el, eventName, prevEvents[eventName]);
    }
  }
}
function updateEventListeners(el, prevEvents, events) {
  var eventName;

  if (!prevEvents || !events || prevEvents === events) {
    return;
  }

  for (eventName in events) {
    // Didn't change.
    if (prevEvents[eventName] === events[eventName]) {
      continue;
    }

    // If changed, remove old previous event listeners.
    if (prevEvents[eventName]) {
      removeEventListeners(el, eventName, prevEvents[eventName]);
    }

    // Add new event listeners.
    addEventListeners(el, eventName, events[eventName]);
  }

  // See if event handlers were removed.
  for (eventName in prevEvents) {
    if (!events[eventName]) {
      removeEventListeners(el, eventName, prevEvents[eventName]);
    }
  }
}
function updateEventListeners ( el , prevEvents , events ) { var eventName ; if ( ! prevEvents || ! events || prevEvents === events ) { return ; } for ( eventName in events ) { // Didn't change. if ( prevEvents [ eventName ] === events [ eventName ] ) { continue ; } // If changed, remove old previous event listeners. if ( prevEvents [ eventName ] ) { removeEventListeners ( el , eventName , prevEvents [ eventName ] ) ; } // Add new event listeners. addEventListeners ( el , eventName , events [ eventName ] ) ; } // See if event handlers were removed. for ( eventName in prevEvents ) { if ( ! events [ eventName ] ) { removeEventListeners ( el , eventName , prevEvents [ eventName ] ) ; } } }
Handle diffing of previous and current event maps.

@param {Element} el
@param {Object} prevEvents - Previous event map.
@param {Object} events - Current event map.
Handle diffing of previous and current event maps .