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SyntheticKeyboardEvent.js
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/
SyntheticKeyboardEvent.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import SyntheticUIEvent from './SyntheticUIEvent';
import getEventCharCode from './getEventCharCode';
import getEventKey from './getEventKey';
import getEventModifierState from './getEventModifierState';
/**
* @interface KeyboardEvent
* @see http://www.w3.org/TR/DOM-Level-3-Events/
*/
const SyntheticKeyboardEvent = SyntheticUIEvent.extend({
key: getEventKey,
code: null,
location: null,
ctrlKey: null,
shiftKey: null,
altKey: null,
metaKey: null,
repeat: null,
locale: null,
getModifierState: getEventModifierState,
// Legacy Interface
charCode: function(event) {
// `charCode` is the result of a KeyPress event and represents the value of
// the actual printable character.
// KeyPress is deprecated, but its replacement is not yet final and not
// implemented in any major browser. Only KeyPress has charCode.
if (event.type === 'keypress') {
return getEventCharCode(event);
}
return 0;
},
keyCode: function(event) {
// `keyCode` is the result of a KeyDown/Up event and represents the value of
// physical keyboard key.
// The actual meaning of the value depends on the users' keyboard layout
// which cannot be detected. Assuming that it is a US keyboard layout
// provides a surprisingly accurate mapping for US and European users.
// Due to this, it is left to the user to implement at this time.
if (event.type === 'keydown' || event.type === 'keyup') {
return event.keyCode;
}
return 0;
},
which: function(event) {
// `which` is an alias for either `keyCode` or `charCode` depending on the
// type of the event.
if (event.type === 'keypress') {
return getEventCharCode(event);
}
if (event.type === 'keydown' || event.type === 'keyup') {
return event.keyCode;
}
return 0;
},
});
export default SyntheticKeyboardEvent;