40 lines
1,010 B
JavaScript
40 lines
1,010 B
JavaScript
if (typeof window.KeyboardEvent !== 'function') {
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// e.g. is IE and needs "polyfill"
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const event = KeyboardEvent.prototype;
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const descriptor = Object.getOwnPropertyDescriptor(event, 'key');
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if (descriptor) {
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/** @type {Object.<string, string>} */
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const keys = {
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Win: 'Meta',
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Scroll: 'ScrollLock',
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Spacebar: ' ',
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Down: 'ArrowDown',
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Left: 'ArrowLeft',
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Right: 'ArrowRight',
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Up: 'ArrowUp',
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Del: 'Delete',
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Apps: 'ContextMenu',
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Esc: 'Escape',
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Multiply: '*',
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Add: '+',
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Subtract: '-',
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Decimal: '.',
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Divide: '/',
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};
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Object.defineProperty(event, 'key', {
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// eslint-disable-next-line object-shorthand, func-names
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get: function () {
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if (descriptor.get) {
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const key = descriptor.get.call(this);
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// eslint-disable-next-line no-prototype-builtins
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return keys.hasOwnProperty(key) ? keys[key] : key;
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}
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return undefined;
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},
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});
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}
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}
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