Viewing github.com/facebook/react/packages/react-dom-bindings/src/events/DOMEventProperties.js

```
/**
```

 * Copyright (c) Meta Platforms, Inc. and affiliates.

```
 *
```

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

```
 *
```
```
 * @flow
```
```
 */
```

import type {DOMEventName} from './DOMEventNames';

import {registerTwoPhaseEvent} from './EventRegistry';

```
import {
```
```
  ANIMATION_END,
```
```
  ANIMATION_ITERATION,
```
```
  ANIMATION_START,
```
```
  TRANSITION_END,
```
```
} from './DOMEventNames';
```

import {enableCreateEventHandleAPI} from 'shared/ReactFeatureFlags';

export const topLevelEventsToReactNames: Map<DOMEventName, string | null> =

```
  new Map();
```

// NOTE: Capitalization is important in this list!

```
//
```

// E.g. it needs "pointerDown", not "pointerdown".

// This is because we derive both React name ("onPointerDown")

// and DOM name ("pointerdown") from the same list.

```
//
```

// Exceptions that don't match this convention are listed separately.

```
//
```
```
// prettier-ignore
```
```
const simpleEventPluginEvents = [
```
```
  'abort',
```
```
  'auxClick',
```
```
  'cancel',
```
```
  'canPlay',
```
```
  'canPlayThrough',
```
```
  'click',
```
```
  'close',
```
```
  'contextMenu',
```
```
  'copy',
```
```
  'cut',
```
```
  'drag',
```
```
  'dragEnd',
```
```
  'dragEnter',
```
```
  'dragExit',
```
```
  'dragLeave',
```
```
  'dragOver',
```
```
  'dragStart',
```
```
  'drop',
```
```
  'durationChange',
```
```
  'emptied',
```
```
  'encrypted',
```
```
  'ended',
```
```
  'error',
```
```
  'gotPointerCapture',
```
```
  'input',
```
```
  'invalid',
```
```
  'keyDown',
```
```
  'keyPress',
```
```
  'keyUp',
```
```
  'load',
```
```
  'loadedData',
```
```
  'loadedMetadata',
```
```
  'loadStart',
```
```
  'lostPointerCapture',
```
```
  'mouseDown',
```
```
  'mouseMove',
```
```
  'mouseOut',
```
```
  'mouseOver',
```
```
  'mouseUp',
```
```
  'paste',
```
```
  'pause',
```
```
  'play',
```
```
  'playing',
```
```
  'pointerCancel',
```
```
  'pointerDown',
```
```
  'pointerMove',
```
```
  'pointerOut',
```
```
  'pointerOver',
```
```
  'pointerUp',
```
```
  'progress',
```
```
  'rateChange',
```
```
  'reset',
```
```
  'resize',
```
```
  'seeked',
```
```
  'seeking',
```
```
  'stalled',
```
```
  'submit',
```
```
  'suspend',
```
```
  'timeUpdate',
```
```
  'touchCancel',
```
```
  'touchEnd',
```
```
  'touchStart',
```
```
  'volumeChange',
```
```
  'scroll',
```
```
  'scrollEnd',
```
```
  'toggle',
```
```
  'touchMove',
```
```
  'waiting',
```
```
  'wheel',
```
```
];
```
```
if (enableCreateEventHandleAPI) {
```

  // Special case: these two events don't have on* React handler

  // and are only accessible via the createEventHandle API.

  topLevelEventsToReactNames.set('beforeblur', null);

  topLevelEventsToReactNames.set('afterblur', null);

```
}
```

function registerSimpleEvent(domEventName: DOMEventName, reactName: string) {

  topLevelEventsToReactNames.set(domEventName, reactName);

  registerTwoPhaseEvent(reactName, [domEventName]);

```
}
```

export function registerSimpleEvents() {

  for (let i = 0; i < simpleEventPluginEvents.length; i++) {

    const eventName = ((simpleEventPluginEvents[i]: any): string);

    const domEventName = ((eventName.toLowerCase(): any): DOMEventName);

    const capitalizedEvent = eventName[0].toUpperCase() + eventName.slice(1);

    registerSimpleEvent(domEventName, 'on' + capitalizedEvent);

```
  }
```

  // Special cases where event names don't match.

  registerSimpleEvent(ANIMATION_END, 'onAnimationEnd');

  registerSimpleEvent(ANIMATION_ITERATION, 'onAnimationIteration');

  registerSimpleEvent(ANIMATION_START, 'onAnimationStart');

  registerSimpleEvent('dblclick', 'onDoubleClick');

  registerSimpleEvent('focusin', 'onFocus');

  registerSimpleEvent('focusout', 'onBlur');

  registerSimpleEvent(TRANSITION_END, 'onTransitionEnd');

```
}
```