remove 0 to null transformation

Author: bl00mber

packages/react-dom/src/events/SyntheticKeyboardEvent.js

@@ -16,12 +16,7 @@ import getEventModifierState from './getEventModifierState';
  */
 const SyntheticKeyboardEvent = SyntheticUIEvent.extend({
  key: getEventKey,
- code: function(event) {
- if (event.type === 'keydown' || event.type === 'keyup') {
- return event.code;
- }
- return 0;
- },
+ code: null,
  location: null,
  ctrlKey: null,
  shiftKey: null,

packages/react-dom/src/events/__tests__/SyntheticKeyboardEvent-test.js

@@ -453,7 +453,7 @@ describe('SyntheticKeyboardEvent', () => {
  });
 
  describe('code', () => {
- it('returns code on `keydown`, `keyup` and 0 on `keypress`', () => {
+ it('returns code on `keydown`, `keyup` and null on `keypress`', () => {
  let codeDown = null;
  let codeUp = null;
  let codePress = null;
@@ -487,14 +487,14 @@ describe('SyntheticKeyboardEvent', () => {
  );
  node.dispatchEvent(
  new KeyboardEvent('keypress', {
- charCode: 81,
+ code: 'KeyQ',
  bubbles: true,
  cancelable: true,
  }),
  );
  expect(codeDown).toBe('KeyQ');
  expect(codeUp).toBe('KeyQ');
- expect(codePress).toBe(0);
+ expect(codePress).toBe(null);
  });
  });
  });